Keyboard slide built onto a 14" ball bearing slide with 11-1/4" tray extension One Set (2 Pc.) - Keyboard slide built onto a 14" ball bearing slide with 11-1/4" tray extension Heavy duty cold rolled steel construction with black powdercoat finish Variable height range of 2" to 3-7/8" in 7/16" increments #8x3/4" pan head screws recommended for installation (Not included) ~ Quick FREE Shipping - Limited Time Offer