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The Bipolar is dual-sided, made from 6061 aluminum on the inside and Nylon on the outside. It is designed for Grind with hardness and includes a hard plastic cover to slide better on all surfaces. It comes with a 14mm hole and a conversion adapter to 10mm.
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.