This is priced for a purchase of 10pcs (minimum order)
Basic size defines the air handling capacity. The most popular size for automotive use is 1/4”. 1/4” will handle air volumes up to approximately 40 SCFM (Standard Cubic Feet per Minute) and will connect and disconnect under normal air line pressure. Do not confuse basic size with thread size. Thread size specifies only the size of the pipe fitting the coupler or plug is to be attached to, and has nothing to do with air volume.
Ten different styles of couplers/plugs are in current automotive and industrial use today. They were originally developed by different manufacturers. While there is no advantage of one style over another, the most popular styles are the industrial interchanges. These female fittings work with Milton and most other couplers.