The most popular bottle stopper for woodworkers, pottery, polymer clay, ceramics, antique door knobs and golf balls is now available in solid 360  brass. 
  The 4 o-rings seal all the bottles with 2 o-rings making contact in most bottles.  It is made with 304 FDA kitchen grade stainless and FDA nitrile o-rings.
 It has the 3/8" x 16 tpi threaded stud 1/2" high, non-removable.  
 Top diameter of the stopper is 13/16" and is 1 1/2" tall (less the threaded stud).  

Quantity 1-9 10-19 20-49 50+ 200+
Price (ea.) $7.45 $6.90 $6.60 $5.85 $5.45

Use an 21/64" or 5/16" drill bit for wood.  
 If you use my stopper mandrel, there is no need for a tap.

5 5 3 Product
$7.45 each
$6.90 per unit for buying at least 10
$6.60 per unit for buying at least 20
$5.85 per unit for buying at least 50
$5.45 per unit for buying at least 200

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My same review as with the SS
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Class for the stoppers