10 Pcs Metal U groove Sealed Guide Wheel Pulley Rail Ball Bearing U604ZZ 4 * 13 * 4mm

Features: High quality metal material, it is wearable, durable and long lasting. Total 10pcs in one pack. Great replacement parts extruder accessories for 3D printer to replace your broken one. This is U Groove Wheel Pulley Bearing used for 3D printer High precision, smooth, low noise. Specifications: Color: Silver Material: Metal Inner Diameter: 4mm Thickness: 4mm Outer Diameter: 13mm Groove Depth: 1mm Groove Width: 2.1mm Package Weight: Approx. 30g Quantity: 10Pcs Package List: 10 x U Groove Wheel Pulley Bearing