1.Material: HDPE 2.Dia: 60,76,89,108,114,127,139,152, ... 3.Feature: Anti-dust,water proof 4.Structure: conveyor syste hdpe conveyor rollerThe shell, bearing house and labytinth are all manufactured ... from the most famous polymer material UHMW PE(Ultra High Molecular Weight Polyethylene). Which own the best self-lubrication, impact ...