OPTTICO Office Chair Casters Wheels Replacement - Computer Chair MAT for Hardwood Floors Not Needed, Desk Rollerblade Chair Wheels with Soft Rubber Rollers. Best Chair Casters for Wood Floors

NOT FIT 40mm Diameter Base Hole.
NOT FIT 40mm Specifications:
- Adjustment Height (Piston Travel): 5" (120mm)

- Cylinder Outside Tube Diameter 2", Fits 2"(50mm) bases
- Shaft Diameter 1.1": Fits 1.1" (28mm) Seat Plates(Mechanism)
- Cylinder Length: 11.2" (285mm)
- Extended Length: 15.6" (395mm)
- Compressed length:11.2" (285mm)

Diameter of the outside metal tube is 1.57" / 40mm for bottom, 2" /50mm for above body.
Diameter of the smaller metal tube is 1.1" / 28mm.

Features:
- Adjust height of office chairs
-Class 4 level, Top Quality Level, Heavy Duty Construction, Specialized for Heavy Person,BIFMA Plus Quality
- Allows full 360 degree rotation

Question:

How to Select the gas lift specification, 5"stroke or 4" stroke with sinking ?
Chair in 4" sinking gas lift will be 2"(50mm) shorter than 5" cyclinder at the lowest point,
Chair in 4" sinking gas lift will be 2.75"(70mm) shorter than 5" cyclinder at the highest point.

Please check your worn out gas lift,try to find the similar specification. Or check the solution in the listing photos.That is,
Tall person, short mechanism height,short Base height select 5" stroke with sinking.
Short person, high mechanism height,high Base height select 4" stroke with sinking.
If all in Middle size, both specification is ok.

How to replace the damaged gas lift with the new one ?
Please find the solution in the listing photos or search video in Youtube.

if product missing, what shall I do ?
If happens to receive nothing but an empty package, No worry, just contact MySit by message/email to offer free warranty gas lift. This happens when the gas cyclinder top button triggered by pressed or drop to the ground.

if product not fit or not work, what shall I do ?please contact with us before returning.

CLASS 4 LEVEL GAS LIFT CYLINDER -- This heavy duty gas lift cylinder made with high construction industry standard (BIFMA Plus Qaulity) for heavy person.
ADJUSTABLE HEIGHT 4.7 INCH -- Adjustable Height 4.7 Inch, the fully expanded height is 16.2 inch, the fully compressed height is 11.6 inch.
HEAVY DUTY 450LBs CHAIR PISTON -- MySit office chair gas lift cylinder holds up to 450lbs for most office chair, executive chair, computer chair, gaming chair.
REPLACEMENT PARTS FOR MOST OFFICE CHAIR -- Universal size replacement for most of office chair cylinder, executive chairs cylinder, full 360 degree rotation, smooth and without noise move to all directions.
EASY TO INSTALL -- You can installed easily without additional screws required, fix your sinking office chair by this standard size replacement chair piston instead of purchasing a new chair.
CLASS 4 LEVEL GAS LIFT CYLINDER -- This heavy duty gas lift cylinder made with high construction industry standard (BIFMA Plus Qaulity) for heavy person.
ADJUSTABLE HEIGHT 4.7 INCH -- Adjustable Height 4.7 Inch, the fully expanded height is 16.2 inch, the fully compressed height is 11.6 inch.
HEAVY DUTY 450LBs CHAIR PISTON -- MySit office chair gas lift cylinder holds up to 450lbs for most office chair, executive chair, computer chair, gaming chair.
REPLACEMENT PARTS FOR MOST OFFICE CHAIR -- Universal size replacement for most of office chair cylinder, executive chairs cylinder, full 360 degree rotation, smooth and without noise move to all directions.
EASY TO INSTALL -- You can installed easily without additional screws required, fix your sinking office chair by this standard size replacement chair piston instead of purchasing a new chair.

Top WaffleMaker Reviews

MySit 4.7" Office Chair Gas Lift Cylinder Replacement Parts, Heavy Duty 450lbs Long Stroke Hydraulic Pneumatic Shock Piston Universal Size Fits Most Executive Chairs, Gaming Chair, Class 4;