3pt. bushing reduces from cat. 2 to cat. 1

1020, 2020, 2030, 1530, 1520, 2240, 2040, 2440, 2630, 2640, 2150, 2350, 2550, 2750, 2155, 2355, 2555, 2755, 6200, 6300, 6400, 6210, 6310, 6410