More about Vase Sealing Rubber
This vase sealing rubber is specifically used to fix the bong stem firmly and completely airtight in the vase. The rubber is transparant in color and durable. Moreover, it is suitable for almost all traditional bongs. It is specifically suitable for vases with a normal neck (diameter of 4.5 centimeters). However, it is not 100% guaranteed that the rubber will fit. Therefore, always measure the diameter of the vase carefully first.
Two different sizes of the outer diameter are available: +/- 3.8 mm (small) or 4.7 mm (large)
Use: Pull the rubber with force over the bottom of your bong stem. Take off when it is time for replacement.