After more than 2 years of research and development JOES Racing Products has engineered "DRYAIR", the dryer that works for both compressed air and nitrogen. DRYAIR utilizes a specialized formula of desiccant with the drying capacity of 2 1/2 times its weight. The specialized desiccant creates more surface area effectively drying air or gas in high humidity atmosphere as well as low temperature conditions. DRYAIR is the most effective humidity control at the track or in the shop. Contains 43 cu/in of desiccant, (2) 3/8" NPT safety couplers and (2) 1/4" NPT industrial air hose fittings. Recharge kits available.