Feature:

1. Super strengthened adhesive prevents any separation of velcro from the rubber backer its elf.
2. Diameter: 3", 4", 5", 6", 7".
3. Connection: M10, M12, M14, M16, 5/8"-11.

9704 Series:

(1),  9704 Rubber Backer;
(2),  9704-1 Foam Backer;
(3),  9704-2 Convex Backer;
(4),  9704-3 Aluminum Backer;
(5), 9704-4 M8 backer.