• 24/40 Outer Joint; 19/22 Outer Joint; 14/20 Outer Joint
• 5 packs.
• Hollow glass stopper.
• Hexagon Head Stopper. Convenient to clean and rotate, and side grooves can prevent slippage.
• Borosilicate Glass, Heavy Duty Design, Reusable & High quality.

Hex Head Glass Hollow Stopper