Allegro Breathing Cold Air Source w EF Couplers size_6 3 4 in The CAT 4610S Air Compressor has 52 1118 The CAT 4610S Air Compressor has a Oil Free Dual Piston pump designed to have a life cycle before wear of 3000 Plus hours compared to other comparable air compressors with life cycles of 500 hours or less making it a reliable part of your ventilation and safety equipment setup Description Item Breathing Cold Air Source w EF Couplers For Use With Full Mask and Hood supplied air respirators Fittings 3 4 in Parker Material Plastic Includes Blower Voltage 120 V Color Gray Series 9825 Standards OSHA 29 CFR 1910 Maximum Number of Respirators 2 Maximum Number of Hoods 2 Brand and Series Breathing Cold Air Source System Type Cold Air System Air Flow Varies Current 10