This is a PRO-MT 4x4 Replacement B1 Hinge Pin Holder. Do you need to replace the B1 Mount on your PRO-MT 4x4? Then you came to the right place! This includes the same B1 Mount that comes standard on the PRO-MT 4x4.
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4005-28 | PRO-MT 4x4 Replacement B1 Hinge Pin Holder