{"product_id":"12-2-18-5-inches-office-chair-cylinder-replacement-top-activated-color-matte-black-size-6-3-height-range","title":"12.2-18.5 Inches Office Chair Cylinder Replacement, TOP-Activated - color: Matte Black, size: 6.3‘’ Height Range","description":"\u003ch3\u003eAbout this item\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHEIGHT-MATCHED SIZING GUIDE: No Guesswork! Skip wrong-size hassle! Exact fits by U.S. height: 6.3\" Travel Length (suitable for heights: 6”–6’7”). Ensures 90° knee bends for healthy posture. Multiple sizes available—share your height\/desk size for personalized picks.\u003c\/li\u003e\n\u003cli\u003e**UNIVERSAL FIT: 98% of Top‑Activated Gaming \u0026amp; 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.\u003c\/li\u003e\n\u003cli\u003eSILENT 360° ROTATION + 6.3\" HEIGHT RANGE(Perfect for Standing Office Chair): Annoyed by loud chair adjustments disrupting libraries or open offices? Our office chair hydraulic cylinder glides at \u0026lt;25dB—quieter than a whisper—so you can adjust without disturbing others. We’ve designed it to fit standing desks, with a 6.3\" height range (12.2\" to 18.5\") for personalized comfort. To make setup easier, we include installation gloves—no extra supplies needed, just a smooth process.\u003c\/li\u003e\n\u003cli\u003eCLASS 4 INDUSTRY STANDARD SIZE: 1000LBS Capacity 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. 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.\u003c\/li\u003e\n\u003cli\u003eEXTRA 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.\u003c\/li\u003e\n\u003cli\u003eLIFETIME 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.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Rythalix\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Matte Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 2.4\"D x 2.4\"W x 18.5\"H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 6.3‘’ Height Range\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Brand: Rythalix","offers":[{"title":"Default Title","offer_id":67604675100979,"sku":"B0G5FSFCK4-color-matte-black-size-6-3-height-range","price":49.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0992\/4470\/4051\/files\/31KzeRkmmML_d5928779-c511-4c87-8732-086eca522da5.jpg?v=1791033924","url":"https:\/\/officemellow.us\/products\/12-2-18-5-inches-office-chair-cylinder-replacement-top-activated-color-matte-black-size-6-3-height-range","provider":"OfficeMellow","version":"1.0","type":"link"}