These full-extension drawer slides are zinc plated and come with mounting screws and instructions. Imperial dimensions given are approximate; actual metric dimensions stated in brackets. 100 lb weight capacity based on the 18" length. They have an internal bumper to hold the slide closed and reduce bounce-back. Side clearance is 3/4" plus 1/64" minus 0 each side. Slide height is 2 7/64". Compatible with 32mm system construction.