Nylon piston head with 6 large flow air vents CNC machined. Similar POM or plastic piston heads can often have problems where the thread gets pulled away from the body. On this model the screw and thread creates a strong clamp effect.
From what I've read Nylon offers superior tensile strength and bending stiffness to POM (Acetal) material. It can also handle higher loads and higher temperatures. I recommend you only run in standard builds.
Weight: 9g (with bearing) - 5g (without bearing)
Screw: Steel / Philips head