• 14/20 hallow combination standard taper joint and bottle stoppers are closed at the bottom.
• Interchangeable with standard taper joints and bottle stoppers of the same size.
• Lightweight, yet very strong to reduce chipping and breakage.
• Barrel-shaped head means it is easy to clean and even easier to rotate in or out.
• Grooves in the sides help prevent slippage.
• Flat top allows the stopper to stand on its head, which frees the user’s hand and minimizes potential contamination.
• Borosilicate glass (code 7740).
• Standard taper bottle size: 14.
• Length of ground zone: 20mm.
• Height above ground joint: 28mm.
• Height: 44mm.
• Reusable.