TBS 300 Series Air Switch Single pole, latching or momentary contacts, and are compact in size. Wire connects are 5/16" male quick connect tabs and required panel hole is 5/8" Specs: Function - Latching Air Switch Type - Single Pole Normally Open (spno) Model - TBS 339 Air Switch Mount - 9/16" hole Air Tube Connection Size - 1/8" Barb (b) Switch Amperage - 25A Manufacturer - Tridelta/Tecmark