ITEM NAME:Pneumatic Valve Hand Lever Air Control Pneumatic Valve HV-02 3Position 4 Way Description: P-hole main intake, A-hole B-hole reversing control cylinder front and rear cover, R-hole exhaust (with silencer) Interface thread diameter 12mm Pneumatic three-position four-way hand rotary valve HV-02/03/04 manual switch dynamic reversing person control gas-HV-02 Good sealing / easy installation / quality assurance G thread / belt sealing ring / unwinding material belt The HV series can control multiple cylinders simultaneously, and simultaneously enter and exit simultaneously. Specification: Material: aluminum Product detailed size: 74x90mm/2.91x3.54inch Package Includes: 1 Piece hand rotary valve.1 Piece hand rotary valve. G thread / belt sealing ring / unwinding material belt.