... : Metric hex spacer inside and outside the column with a new environmentally friendly production of imported raw materials, resistant to high temperature, rubbing ... locomotives accelerator wheel, anti-chemical (corrosion resistance, acid and alkali) high strength and toughness, non-conductive, non-rust , small size, beautiful ... .5A=5.6mm, L=8mm, L1=6mmProduction Flow Plastic Nylon Hex Spacer Support