Magura mounting Bolt Spacer Marine Grade Stainless Steel - Part B. Secure your brake assembly through this special steel bracket.. As expected from Trampa this part is made from marine Grade Stainless Steel.. This special part gives the exact space required to fix parts C & D into the Hanger, FT!. Use part A to screw through part B into the fixing C & D into the Hanger. Ensure all the brake parts fixing to the hanger are very tight! FT!!