Specifications: Screw fitting is 1/4" X 40 TPI. Pipe connection for 3mm tubing. Main hole is 3.5mm. You will receive one fully assembled valve. It is NOT a DIY kit.
P20 Reversible Control Valve for Steam Engine Models – 1/4 x 40 TPI
P20 Reversible Control Valve 1/4x40 TPI 3mm Pipe Steam Model
Reversible Control Valve for Steam Engine Model P20
Microcosm P20 Brass Reversible Control Valve Compatible with Steam Engine Models
Reversible Control Valve for Live Steam Engine with 1/4 x 40 TPI Fitting
Reversible control valve for steam engine model Screw fitting is 1/4 "X 40 TPI
