$17.00
Polyoxymethylene (POM) piston head made by Lonex with ball-bearings.
Polyoxymethylene is a low-wearing, low-friction, high-strength and lightweight plastic. Its properties make it an excellent material for a piston head. Other manufacturers use polycarbonate, which is also lightweight and high-strength, but is extremely brittle and will shatter leading to catastrophic failures.
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