DC-6415SC14W …Pair of Captive Roller Keyboard Tray Slides, 14 Inch White Epoxy Finish Self Close. No Shimmy Captive Roller Slides. Great for Keyboard slide out trays. Guided rolling with wheels on right side captive in a U shaped track to ensure straight motion without shimmy. Left side is free to accommodate slight variances in drawer widths. Smooth, silent running on special Delrin and steel wheels. Epoxy coating is especially valuable in high humidity areas. Rated at about 70 lbs per pair. Screw holes centers on multiples of 32mm. Slide extends 4 inches less than its 14 inch length. Accommodates drawer variances up to 3/16 of an inch. Sold by the pair.