Hill Dry-Pac Pro Air Dryer Filter, 2 Refills Compatible with Air Venturi EC-3000 EVO compressor by Hill Can be used with most compressors featuring 1/8" BSPP connections 4 stage filtration Stage 1: PMV (Pressure Maintaining Valve) Regulated Condensation Stage 2: Activated Carbon Filters Stage 3: Absorption Desiccant Media Stage 4: Micro Fiber Removes harmful moisture before it enters your PCP or tank Uses 1/8" BSPP connections Includes 2 refill packs and high pressure hose