Complete, integrated steel platform systemInboard and outboard mounting 7 position adjustment: 2.25" - 3.60" Fits 23"-29" wide spaces 75 lb. class Black standard finish Precision steel ball bearing slide assembly with lockout Cushion palm rest wraps around the front edges of drawer Ambidextrous mousing surface Injection molded accessory tray with extended slides 7 position height adjustable keyhole mounting brackets 25 1/2" wide platform