10-New top quality .192" diameter solid steel metering block emulsion tube and vacuum port plugs for Holley 2 and 4 barrel performance carburetors. Also fits similar AED, Avenger, BG, Grant, Demon, QFT, Street Avenger carburetors. Please see our store listings for more metering blocks, parts, kits and a complete selection of hard to find hardware for Holley carbs.