Air Systems BAC 10 International 9 CFM Low Pressure Breathing Air Compressor (For Use With Constant Flow Respirators) (1 EA) Straws and Stirrers and advanced arc detection electronics and advanced arc detection electronics for use with all arc welding processes The strap accommodates either having one foot or both feet in the loop at a time it will relieve the pressure to both sides with just one foot in allowing for added movement of the legs Air pump includes 1 hood style respirator or 2 tight fitting constant flow masks and has a pressure gauge that ranges between 0 30 psig It comes with prewired switch and plug with an on off operation