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8.4-10.9 Inches Office Chair Cylinder Replacement, TOP-Activated - color: Polished Steel, size: 2.4‘’ Height Range

8.4-10.9 Inches Office Chair Cylinder Replacement, TOP-Activated - color: Polished Steel, size: 2.4‘’ Height Range

$41.48 USD
$41.48 USD
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Taxes included. Shipping calculated at checkout.

About this item

  • HEIGHT-MATCHED SIZING GUIDE: No Guesswork! Skip wrong-size hassle! Exact fits by U.S. height: 2.4" Travel Length (suitable for heights: 4’9”–5’7”). Ensures 90° knee bends for healthy posture. Multiple sizes available—share your height/desk size for personalized picks.
  • **UNIVERSAL FIT: 98% of Top‑Activated Gaming & Ergonomic Chairs**: This gas lift fits standard 1‑1/8" (28mm) piston shafts and works with 98% of top‑activated office, gaming and ergonomic chairs, including factory‑original Herman Miller Aeron made 1996‑2012.⚠️ **NOT COMPATIBLE with side‑activated chairs**: Do not fit models with offset side‑valve hardware such as Steelcase Leap series or post‑2013 Herman Miller Aeron Remastered. Contact us and we can verify compatibility if you are unsure.
  • SILENT 360° ROTATION + 2.4" HEIGHT RANGE(Perfect for Standing Office Chair): Annoyed by loud chair adjustments disrupting libraries or open offices? Our office chair hydraulic cylinder glides at <25dB—quieter than a whisper—so you can adjust without disturbing others. We’ve designed it to fit standing desks, with a 2.4" height range (8.4" to 10.9") for personalized comfort. To make setup easier, we include installation gloves—no extra supplies needed, just a smooth process.
  • CLASS 4 INDUSTRY STANDARD SIZE: 1000LBS Capacity + BIFMA Certification: We know standard desk chair cylinders often fail under heavy use—leaving you frustrated with wobbly or unsafe seating. Our office chair cylinder is built for industrial-grade reliability, with BIFMA-certified hydraulic components. We ensure it supports 3X more weight (1000lbs) than ordinary cylinders, so you can trust it for heavy-duty needs. We stand by its quality, so you won’t face frequent replacements.
  • EXTRA HEAVY-DUTY: We know pneumatic piston cylindersafety is non-negotiable—cheap options leak or fail prematurely. Our hydraulic cylinder has Class 4 components (highest durability rating for chair parts) and an explosion-proof design with no sudden malfunctions; lab-tested to last 10+ years in high-wear spaces like gyms and workshops, it outperforms low-grade alternatives that break down in months, and we ensure it stands up to rigorous use.
  • LIFETIME WARRANTY + 24/7 US-BASED SUPPORT: We hate complicated after-sales processes. If your office chair piston ever fails due to manufacturing defects (non-human damage), we’ll send a free replacement—no returns required. Our US-based experts are available 24/7 to answer questions, from installation to warranty claims. We’re here to make sure you’re satisfied, so you can shop with confidence.

Overview

  • Brand: Rythalix
  • Color: Polished Steel
  • Material: Alloy Steel
  • Product Dimensions: 2.4"D x 2.4"W x 10.9"H
  • Size: 2.4‘’ Height Range

Low stock: 10 left

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Reviews

  • ⭐⭐⭐⭐⭐

    Emily Carter — Seattle, Washington

    I found several useful workspace products at OfficeMellow, and the overall selection felt practical and easy to browse. The items fit well into my home office and helped make the space feel more organized, comfortable, and ready for everyday work.

  • ⭐⭐⭐⭐⭐

    Daniel Brooks — Austin, Texas

    OfficeMellow offers a thoughtful mix of furniture, electronics, and office accessories. The product information was easy to understand, and I was able to find options that matched the size and layout of my workspace without making the setup feel complicated.

  • ⭐⭐⭐⭐⭐

    Jason Reed — Denver, Colorado

    I like that the products are focused on real workspace needs rather than unnecessary extras. I chose a few items for desk organization and device positioning, and they helped create a cleaner setup that feels easier to use throughout the day.

  • ⭐⭐⭐⭐⭐

    Olivia Bennett — Portland, Oregon

    The selection worked well for upgrading my small home office. The products felt practical, fit naturally into my existing setup, and made it easier to keep my equipment, cables, and work area organized. I would consider shopping here again.

FAQ

What types of products does OfficeMellow sell?

OfficeMellow specializes in home office and small business workspace products, including office desks, chairs, storage furniture, monitor and laptop stands, office electronics, cable management, task lighting, shredders, laminators, scanners, docking stations, and related accessories.

How can I check whether a product will fit my workspace?

Please review the dimensions, weight capacity, mounting requirements, and available clearance listed on the product page. For desks, chairs, cabinets, and mounted accessories, we recommend measuring your room, doorway, desk surface, and installation area before ordering.

How do I know whether an electronic accessory is compatible with my device?

Check the product page for supported device models, port types, operating systems, voltage, plug type, monitor size, weight limits, or printer compatibility. Contact us before purchasing if you are uncertain about compatibility.

Do office furniture products require assembly?

Many desks, chairs, cabinets, stands, and shelving products require some assembly. Assembly requirements and included hardware vary by product, so please review the individual product description and instructions before purchase and use.

How much does shipping cost?

OfficeMellow charges a flat standard shipping fee of $6.90 per eligible order, unless a different charge or delivery restriction is clearly shown during checkout.

How long does order processing and delivery take?

Orders are generally processed within 1–3 business days. Estimated delivery within the United States is typically 5–10 business days after shipment. Oversized furniture, split shipments, carrier delays, or high-demand periods may require additional time.

Why did only part of my order arrive?

Products may be stored in different warehouses or shipped in multiple boxes. As a result, items and furniture components may arrive separately with different tracking numbers. Please review all shipping confirmation emails before reporting an incomplete delivery.

Can I change or cancel my order?

Please contact us as soon as possible after placing your order. We will make a reasonable effort to update or cancel an order that has not entered processing or shipment, but changes and cancellations cannot be guaranteed once fulfillment has begun.

What is your return policy?

Eligible products may generally be returned within 30 calendar days of delivery, subject to our Return & Refund Policy. Items should be unused, unassembled, uninstalled, and returned with their original packaging, hardware, manuals, and accessories. Contact us for authorization before sending a return.

What should I do if my product arrives damaged, defective, or incomplete?

Contact us within 7 calendar days of delivery whenever reasonably possible. Include your order number, a description of the issue, and clear photographs of the product, packaging, shipping label, and affected components. Please retain all packaging until the claim has been reviewed.

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