Product: Delrin Mini V Wheel Kit (12 Pack) for 20mm Aluminum Extrusion Linear Rail, CNC, 3D Printers
Brand: ProtoBuilds
Compatible with 20mm x 20mm V profile aluminum extrusion rail systems. Each wheel kit includes: (1) Delrin mini V wheel, (2) Ball bearings 4x10x5mm, (2) Precision shim 8x5x1mm, (1) M5 lock nut with nylon insert. Delrin mini V wheel specs: Rockwell Hardness: M80, Compression Strength: 63MPA, OD: 15.33mm, ID: 9.974mm +/- 0.026, Thick: 8.95mm, Material: Delrin, Color: black
Each wheel kit includes:
(1) Delrin mini V wheel
(2) Ball bearings 4x10x5mm
(2) Precision shim 8x5x1mm
(1) M5 lock nut with nylon insert

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