Two sizes one size fits 1/4 inch valves and one fits 3/8 valves. There are as many as 50 different diameters and thread sizes of orifices. Part #141372 for 1/4 orifice and Part# 381372 for 3/8 orifice
ORIFICES SOLD WITH VALVES
To purchase, please contact us at 713-674-6087 between the hours of 9:30am and 6:30pm Central Time.