Front Storage:. 11"W x 2 7/8"D x 2 1/4"H. Side Storage:. 2 13/16"W x 16 7/16"D x 2 1/4"H. Knife Storage Area:.7 13/16"W x 16 7/16"D x 2 1/4"H. Knife Holder:.7 3/4"W x 9"D x 3/4"H. Cutting Board:.13 1/4"W x 20"L x 1 1/4" H. Support Frame:. 14 1/2"W x 23"D x 4 1/2"H. Each Kit Contains:. Knife Rest, Cutting Board, Full-Extension Slides, Mounting Hardware and Screws (Knives not included). Compatible with our RTA 18" Base Cabinets and Drawer Base Cabinets. Kit replaces the drawer box that is included with each drawer and base cabinet.