4ft Plastic Sliding Door Track: This door track slider is ideal for 1/4" by-passing glass doors. These cabinet track slide kits are made of high-impact extruded polystyrene, this track is made especially for small, lightweight bypassing doors. Fits 1/4" Thick Panels: This sliding closet doors track system works great with 1/4" thick by-passing glass doors and can be cut to size. Upper track: 9/16" H, 7/8" W, 48" L - Lower track: 5/16" H, 7/8" W, 48" L DIY Sliding Doors: Our sliding glass door track is perfect for sliding glass doors for doctor offices, cabinets, checkout counters, or even reptile cages! The Rockler sliding door hardware for cabinets are an ideal solution for your home project. Easy To Install: This track sliding door is quick and easy to install. Our track for sliding doors includes durable upper and lower tracks. Rockler Woodworking 4 Foot Plastic Sliding Cabinet Door Hardware Track: Our sliding track system is ideal for 1/4" by-passing glass doors. This window track sliding door for cabinet is made of high-impact extruded polystyrene, this track is made especially for small, lightweight bypassing doors. Includes durable upper and lower tracks. --- For Sliding Doors: Our double sliding door track is perfect for sliding glass doors for doctor offices, cabinets, checkout counters, or even reptile cages! --- What’s Included In This Cabinet Sliding Door Track? (1) Pair 4 Foot Plastic Sliding Door Track. --- Provides Smooth Glide: Our aluminum 4-foot sliding glass door track replacement has nylon rollers that provide a smooth glide when opening or closing each door. --- Tech Specifications For Sliding Glass Hardware: Upper track: 9/16" H, 7/8" W, 48" L - Lower track: 5/16" H, 7/8" W, 48" L - Can be cut to size.