Newborn round rod caulk gun. Features multi-chemical resistant twin hytrel cup. Precision sintered friction plate included. Made of lightweight aluminum barrel. Easy release star-burst reverse gripping plate. It includes ring cap, (3) 620 cones and 1 each of sausage cup, dual hytrel cup and conical ejector. Bulk/sausage conical ejector. Heat treated rod for longer rod life. It has a 18:1 thrust ratio.