[Features]Heavy Duty Office Chair tilt control back and forth, gas cylinder height activation,Can be twisted to tighten or loosen backward tilt tension [Universal Size]Tilt control mechanism fit for most chairs cylinder,is great for replacement and upgrade for almost all mesh chair, ergonomic office chair, desk chair and task chair [Premium Grade Replacement]This chair lift control give your chair , Stable use, tilt control no noise. [Easy to Use] twist wheel to tighten or loosen (adjust) backward tilt tension. Push lever to tilt, pull out to unlock. [Function]Single lever for gas cylinder height activation, accepts standard 28mm inner diameter tapered gas lift cylinders.<br><br>The product appearance slightly from batch to batch, but it does not affect the use Colour:Black Material:iron Size:15x22cm<br><br>Package Contents: 1 x Chair Tilt Control Mechanism<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.