Rev-A-Shelf 4SDI-24 / 22 in Wood Spice Drawer Insert Fan What does this mean

What does this mean

Four-layer design makes it more durable and resistant to leaks

(2) u-shape supports

5-2 Day or Non-Programmable

Rev-A-Shelf 4SDI-24 / 22 in Wood Spice Drawer Insert Fan What does this mean[shortdesc] Product Dimensions (in) 22"W x 19. 75"D x 1. 55"H Slides No Soft Close No Gas Assist No [ shortdesc] Rev A Shelf's popular 4SDI Spice Drawer Inserts available in beautiful Maple! Designed for 24 or smaller base cabinet drawers. This trim to fit insert features Maple construction with a satin finish, one rear storage compartment and up to three tiers for all your spices. Features Spice insert can be trimmed to a custom fit for most any