uxcell Home Window Curtain Track Carrier Glide Rail Rollers 40Pcs Color: White, Green; Total Size: 35 x 20 x 13mm/1.4" x 0.8" x 0.5"(L*W*H) Material: Plastic; Net Weight: 77g Package Content: 40 x Curtain Track Rollers; Product Name: Curtain Track Roller Roller Diameter: 13mm/0.5" Hole Diameter: 6mm/0.24",5mm/0.2"