Replacement Main and Idle Jets for EMPI and Solex-Style replacement carburetors and Solex/Brosol carburetors. The kit features a see-though EMPI box with compartments for each Jet Size and a Legend on the inside cover. Each kit comes with ¦10 pieces each of Main Jets from 112.5 to 140 in 2.5 increments, 5 pieces each Main Jets from 145 to 170 in 5.0 increments, 10 pieces Idle Jets from 45 to 70 in 5.0 increments.