- Supply TypeManufacturer, Exporter, Supplier
- Preferred Buyer Location All over the world
639   Diamond flywheel US patent     (shank size: 3mm) 2mm 120° up   to 180° 639A  2mm 100° to 110° lining, concave, convex 640  3mm 120° up to 180° 640A 3mm 100° to 110° lining, concave, convex