FITS 1/2" THICK PANELS. This plastic sliding door track system works with 1/2" thick wood panels. Perfect for sliding showcase doors, bookcases, cabinets, reptile tanks, honeycomb panels and more. SMOOTH, QUIET OPERATION. Allows panels to slide smoothly and quietly without glides, wheels or lubricant. DIY FRIENDLY. Sliding door track is easy to install using screws, glue or double-sided adhesive. The 36” long plastic channel can be trimmed to fit your needs. PREMIUM QUALITY. Made of durable Styrene with long-lasting black finish. COMPLETE SLIDING DOOR TRACK SET. Your order contains an upper track (1-3/8" W x 11/16" H x 36" L) and a lower track (1-9/32" W x 11/32" H x 36" L) Outwater Plastics' plastic sliding door track set features an upper track, and lower track. It is designed for installing by-passing 1/2" thick sliding doors with a 9/16” gap. Popular applications include sliding door track replacement, sliding showcase doors, bookcases, wood small cabinets, vanities, medicine cabinets reptile tanks, vivariums, honeycomb panels and more. Our sliding door track system allows wood doors to slide smoothly and quietly without requiring glides, wheel or lubricant. Installation is fast and easy. Simply apply screws, glue or double-sided tape. Our upper/lower sliding door track is manufactured from durable Styrene that can withstand years of use. It features a solid black finish. Upper Track Dimensions: 1-3/8" W x 11/16" H x 36" L. Lower Track Dimensions: 1-9/32" W x 11/32" H x 36" L.