Standard Long Safety Valve X005.
Standard Safety valve for most Modern Mamod Steam Engines. 
Includes TE1, TE1A, SR1, SR1A, SW1, SE2a, Steam Cars, Static Steam Engines SP2, SP4, SP5 etc .
Overall length 38mm with 1/4 inch BSF thread.
Not suitable for the SE1 SE2 or SE3 - See our other listings.