Compare Ridgid Ridgid Pipe Die Set, 26192, NPT, 2-1/2 Inch-4 Inch These high-speed dies from Ridgid offer NPT threading for stainless steel and work with a pipe capacity of 2-1/2 Inch to 4 Inch. Ridgid has remained the symbol of certainty to dedicated professionals... Compare Quick view Qty in Cart: 0 Price: Log in for pricing and quote Subtotal: