Keep a low profile as you transition your 18mm female joint to connect with a 14mm male piece. This forward-thinking device is popularly used to convert an 18mm male joint into a 14mm female joint. GRAV are not surprisingly the masterminds behind this design. These Austin-based glass masters have created an awesome lineup of water pipes and attachments -- it’s only logical they’d move on next to helping us GRAV fans get the most out of them! A frosted glass finish secures the glass adapter into place. Though GRAV connoisseurs often like the extra precaution of a keck clip to secure their favorite pre-coolers and ash catchers. This palm sized piece certainly makes a massive impact. Mix and match pipes and pieces for complete customization freedom. What epic innovation will you put together? This adapter also functions with dry J-Hook pipes as you may have spotted on popular HBO characters.