Mechbox Pro CNC Piston Head – Single o-ring

Features:Precision CNC Aluminum ConstructionDouble O-Rings for better air seal / higher velocityImproved durability over factory plastic nozzleSmaller vent holes along with negative air pressure help bb feedingProprietary O-Ring compound for maximum durability and air sealBall bearing mount for smooth operationSuitable for higher power (25bps) applications