Sand casting mold steel gas slit vent, pressure die casting mold core vent slotted type 20000pcs ready delivery out!

Sand casting mold steel gas slit vent, 
pressure die casting mold core vent steel slotted type, 
dia 4-25mm, slit 0.2, 0.3, height 10mm.
20000pcs ready delivery out!  Good quality, ready out.
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