Anti-Static Flow Rail/ Flow Rack in pressed steel frame, the diameter is 28mm or 33mm, zinc-plated steel frame Our Antistatic Flow Rail/ Flow Rack in pressed steel frame, the diameter is 33mm, pitch is 35.5mm.zinc-plated steel frameWe also have dia. 28mm iron steel flow racks and aluminium flow racksMore deatils, please feel free to contact us Antistatic Flow Rail/ Flow Rack