Brand Frassie Color Black Material Alloy Steel Product Dimensions 12"D x 11"W x 5"H Frame Material Alloy Steel Special Feature Adjustable Height Heavy Duty Control Mechanism: office chair Tilt control mechanism with 5.92 " W x 10.15 " L mounting holes. 4.25mm thick steel: The gaming chair swivel tilt base is made of 4.25mm thick steel and can hold up to 500lbs. Fits most chair cylinder: Fits 1.1inch head diameter chair cylinders. Tilt Control: Pull to unlock tilt, Push lever to lock tilt. [Service] If there is any problem with the product, we will solve it for you in time.