MASTERY MART 9-13 Inch Office Chair Cylinder Replacement with Gloves, 4" Stroke Gas Lift, Heavy Duty 1000 Lbs Class 4 Hydraulic Pneumatic Piston, Universal Fit

아마존 달러(USD) 가격을 각 날짜의 환율로 원화 환산해 표시합니다. 현재 환율 $1 = ₩1,463 (2026-07-27 기준)

상품 특징

• 【 Stop Your Chair from Sinking 】 — High-precision gas pressure seal and premium-grade carbon steel piston rod eliminate the most common chair failure: seat slowly sinking down under weight. BIFMA/ANSI Class 4 certified and SGS tested to maintain set height for years, even under frequent daily use. No more readjusting every few minutes.
• 【4" Stroke Perfect for Low-Profile Chairs 】 — Compressed length: 9.88 in (251 mm); fully extended: 13.62 in (346 mm). Designed for users 5'4" and under, or anyone who prefers a lower seat position. Total seat height range: approximately 15–19 inches from floor. Measure your existing cylinder length (outer tube, bottom to top) before ordering to confirm fit.
• 【 Universal Fit with 2" Standard Dimensions 】 — Outer cylinder diameter: 2 in (50 mm) fits into the chair base socket. Piston shaft diameter: 1-1/8 in (28 mm) connects to the seat plate. These two measurements fit the vast majority of office, executive, and gaming chairs. Check both your base socket size and seat plate hole diameter before purchase.
• 【 Class 4 Heavy Duty Carbon Steel 】 — Manufactured to BIFMA/ANSI highest industry standard, SGS certified. Premium steel construction supports up to 1000 lbs. Engineered to prevent sinking and common height adjustment failures found in lower-grade cylinders.
• 【 5-Minute Tool-Free Installation 】 — Lean the chair on its side. Strike the base ring upward with a rubber mallet to release the old cylinder — no screwdriver needed. Slide the new cylinder straight into the base socket until it clicks firmly. Flip the chair upright, reattach the seat plate, and sit down to lock the piston in place. Rubber gloves included for a clean, safe grip during removal.