pipe mould:steel tube, plum tube, flat tube, oval tube, fan-shaped tube, polygonal tube, single and double groove pipe and ... tube, plum tube, flat tube, oval tube, fan-shaped tube, polygonal tube, single and double groove pipe, tube frame, special-shaped mould, etc.5. Specification range for ... material. We choose hign-quality tool steel Cr12mov as raw materials, mouild steel Cr12mov material set high ...