Stainless Steel Standing Bottle Stopper - 10 Pack - Made in USA (Woodturning) Stainless Steel Bottle Stopper - The "original" SS Niles bottle stopper Lifetime FDA grade nitrile o-rings (3 sizes ensure a tight seal) 3/8'' x 16 TPI non-removable stud (cut from a single block of steel) Designed so the stopper is hidden inside the bottle when used to showcase your work Made and Patented in the USA