Reducers & Enlargers PI061206S Stem reducer, 3/8" stem x 3/16" tube £0.50 PI061210S Stem reducer, 3/8" stem x 5/16" tube £0.55 PI061006S STEM REDUCER, 5/16" STEM X 3/16" tube £0.52 PI131012S Stem reducer, 5/16" stem x 3/8" tube £0.67