Comparison : Item # MZEU12E1+E2, MZEU-12 mm Bore Cam Clutch
Item # MZEU15E1+E2, MZEU-15 mm Bore Cam Clutch
Item # MZEU20E1+E2, MZEU-20 mm Bore Cam Clutch
Item # MZEU25E1+E2, MZEU-25 mm Bore Cam Clutch
Item # MZEU30E1+E2, MZEU-30 mm Bore Cam Clutch