Please Note: Package includes: Coupling x 1 + screw x 4 + wrench x 1

Size description:

1. The following 12 types, the outer diameter is 14mm, length is 22mm, use M4 machine screws for the side holes:3.17-3.17, 4-4, 4-5, 4-6, 5-5, 5-6, 5-8, 6-6, 6-8, 7-7, 7-8, 8-8mm

2. The following 4 types, the outer diameter is 16mm, length is 22mm, use M4 machine screws for the side holes:5-10, 6-10, 8-10, 10-10mm

3. The following 3 types, the outer diameter is 20mm, length is 22mm, use M5 machine screws for the side holes:8-12, 10-12, 12-12mm