The Stolen Thermalite post is Nylon with 50% long glass fibre infusion. Thermalite posts are 30% lighter than the current Alloy posts on the market. A great way to discreetly trim some weight. Type: Pivotal. Length: 75mm or 135mm. Weight: 41g or 79g. Colours: Black, White, Green, violet, Red, Blue Ultra Light. Pivotal Compatible