4Pcs 6X30X13mm Plastic Coated Sealed Bearings Steel 606ZZ Deep U Groove Guide Pulley Rail Ball Rolling Bearing Wheel

colour:Orange Material:Plastic + bearing steel Size:0.6 x 3 x 1.3cm/0.24 x 1.18 x 0.51 inch(ID x OD x T) Inside Diameter: 6MM Outside diameter: 30MM Thickness: 13MM Package Contents: 4 x Bearing Pulley Wheel Only the above package content other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.