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GCDI2020.Heavy-Duty Replacement Gas Lift Cylinder for Herman Miller Classic Aeron Chair (Pre-2013) – Top Activated Pneumatic Lift – Class 4 Hydraulic Piston, Fits Sizes A, B, & C – 450 lbs Capacity

GCDI2020.Heavy-Duty Replacement Gas Lift Cylinder for Herman Miller Classic Aeron Chair (Pre-2013) – Top Activated Pneumatic Lift – Class 4 Hydraulic Piston, Fits Sizes A, B, & C – 450 lbs Capacity

$58.08 USD
$58.08 USD
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Taxes included. Shipping calculated at checkout.

About this item

  • HEAVY-DUTY CLASS 4 DURABILITY: Upgrade your seating with a commercial-grade Class 4 gas lift. Built to exceed BIFMA standards, this reinforced steel cylinder supports up to 450 lbs (204 kg), providing a much higher weight capacity and longer lifespan than standard factory parts.
  • PERFECT COMPATIBILITY FOR CLASSIC AERON: Specifically engineered for the Classic Herman Miller Aeron manufactured before June 2013. This top-activated mechanism is a direct OEM-spec replacement for chairs where the adjustment cable or lever engages the button at the very top of the cylinder
  • SMOOTH & SILENT ADJUSTMENT: Restore your chair’s original "like-new" feel. Our high-pressure pneumatic shock ensures quiet, effortless height adjustments and 360-degree rotation without the "sinking" feeling or jerky movements common in worn-out cylinders.
  • UNIVERSAL FIT FOR SIZES A, B, & C: Whether you own the Small (A), Medium (B), or Large (C) model, this cylinder is designed to fit the standard 50mm (2") base taper. It restores the full 5-inch travel range, allowing you to find the perfect ergonomic height for your desk.
  • STRAIGHTFORWARD DIY INSTALLATION: No need to buy a costly new chair. This replacement can be installed quickly once the old cylinder is removed. Because factory cylinders naturally wedge deeply into the wheelbase over years of use, a pipe wrench, mallet, and penetrating oil are highly recommended to easily break the original seal.
  • TRUSTED QUALITY ASSURANCE: Benefit from GCDI2020’s industry-leading reputation in chair restoration and customer care. Every chair cylinder is protected by a 2-year limited warranty and backed by our commitment to excellent service, ensuring a worry-free upgrade for your workspace.
  • 2‑YEAR LIMITED WARRANTY: Manufacturer Defect Only. Covers defects in materials and workmanship for 2 years; we will repair, replace, or refund. Buyer pays initial return shipping; we reimburse if defect is confirmed.

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    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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