The kit is composed of:
2 *M12 cleats
2 *M12 threaded rods
2 *M12 hex head nuts
2 *hemispherical washers

The kit is composed of:
2 *M16 cleats
2 *M16 threaded rods
2 *M16 hex head nuts
2 *hemispherical washers 28-16.5

The kit is composed of:
2 *M18 cleats
2 *M18 threaded rods
2 *M18 hex head nuts
2 *hemispherical washers 35-18.5