Black PU Material Wheel Pulley Roller With Two Bearing ,the inside bearing material are with Chrome steel ,we can produce inner hole szie with 5mm 6mm 7mm 8mm 10mm.
inner diameter M4 mm Outer diameter 28.5 mm Width 8mm 688 2RS V groove bearing wheel ,are produce with Chrome steel Gcr15 and POM coated material ,we can provide with sample for you .
