Cheap And Discounts 1/8" 1/4" 3/8" 1/2" - 4" NPT Male Round Nipple 304 316 Stainless Steel Connector Pipe Fitting Water Gas Oil 225 PSI Wholesale. Buy Directly From Merchant Shop1102553519 Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.