uxcell Wardrobe Sliding Door Roller Gear Track Panel Internal Kit 3 Pairs Color: Brown, White; Material: Plastic; Net Weight: 38g Package Content: 3 Pairs x Sliding Door Roller; Product Name: Sliding Door Roller Gear Track Panel: 52x32x11mm(L*W*T); White Wheel Size: 21 x 4mm/0.83" x 0.16"(L*W) Threaded Dia: 35mm/ 1.4"; Mount Hole Dia: 3.5mm/ 0.14" Holes Center Distance: 44mm(Gear Panel), 25mm(Roller Plate); Size: Roller Plate:58x39x11mm(L*W*T)