FITS 1/8" THICK PANELS. This plastic sliding door track system works with 1/8" thick glass or wood panels. Perfect for sliding showcase doors, bookcases, cabinets, reptile tanks, hunting blind windows 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 brown 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 features an upper track, and lower track. It is designed for installing by-passing 1/8" thick sliding doors with a 5/32” gap. gap. It is great for use as a replacement sliding door track or for creating new sliding showcase doors, bookcases, sliding cabinet windows reptile tanks, vivariums, hunting blind windows, sliding pegboard doors and more. Our sliding door track system allows acrylic, wood or glass 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. Each plastic channel is 1/2” wide x 36" long and comes in a pack of 4. Our upper/lower sliding door track is manufactured from durable Styrene that can withstand years of use. It features a solid brown finish. Upper Track Dimensions: 1/2" W x 7/16" H x 36" L. Lower Track Dimensions: 1/2" W x 1/4" H x 36" L.