High quality made stainless steel cylinder with an inner diameter of 23.75mm. Gives an excellent seal with all cylinder heads I tested.
** Picture differs slightly. Latest version has 4 vents
Specifications
Material: Stainless steel
Internal Diameter: 23.75mm
Length: 72mm
Hole: 4/5 (52mm from end)
Recommended Barrel Length: 357mm - 369mm
Cylinder Size Guide