Uxcell a15090900ux0210 Rollerbolt Plastic Curtain Track Carrier Glide Rollers 22Mm Height 30 Pcs White Color: white; total size: 11 x 11 x 22 mm/0.43" x 0.43 inch x 0.87"(L*w*h) Material: plastic; net weight: 21G Package Content: 30 Pcs x curtain track rollers; product Name: curtain track roller Bolt size: 4 x 3 mm/0.16" x 0.12"(D*l) Hole size: 8 x 4 mm/0.3" x 0.16"(L*w)