Our Bonza Silicone Black Grommet is the perfect addition to support your bonza 15mm diameter stem. Designed to fit snugly into a 21mm hole, this silicone grommet ensures a secure and stable connection, enhancing your smoking setup. Elevate your bonza experience with the reliability and durability of our black silicone grommet.

Product Specifications:

• Designed to fit a 21mm hole to support a standard 15mm diameter BONZA stem.
• Material: Silicone