The NEW TechT Stainless Steel HPA Fill Nipple. The company that gives you some of the best aftermarket parts now makes the perfect fill nipple. Our LoPro replacement fill nipple keeps thing tight around your regulator and assure that you never strip it out. Perfect for people needing to replace their worn out fill nipple, or for those people who like to know they are using the best at all times. Our fill nipple is made from top grade stainless steel and comes with TechT's LIFETIME warranty.