Mikuni Carburetor Rubber Mounting Sleeve Boot with 45 Degree Bend and 40mm Id Both Ends Heavy duty rubber sleeve with 40mm ID and reinforced 45 degree bend Contoured 34mm internal bore for maximum flow Suits Mikuni 30, 32 and 34mm carburetors Will adapt to fit motorcycle carb spigots ranging from 38 to 42mm ID Stainless steel clamps with rolled outer edges included