
Grav Labs 18.8mm Male to Male Angled Joint Glass Adapter
This Grav Labs 18.8mm Male to Male Angled Joint Adapter is perfect to set up a new custom rig.
Made out of top-quality borosilicate glass construction, this glass adapter is perfect to set up a new custom rig angled for converting a 45-degree joint into a 90-degree joint and an 18.8mm female joint into an 18.8mm male joint.
Make your bong compatible with different accessories with this resilient and robust glass build adapter.
📦 100% Plain & Discreet Packaging
100% plain and discreet packaging in unmarked cardboard boxes with neutral sender details. Zero mention of smoke or glass on the outside.
🚚 Dispatch & Delivery Timelines
Orders received on business days before 12:00 PM are queued for same-day packing. Domestic delivery typically arrives in 2–4 business days via USPS Priority Mail or UPS Ground.
🛡️ 30-Day Return Policy
30-day return policy for unused, unopened items in original packaging. Return shipping is covered by the customer unless damaged on arrival.
For borosilicate glass bongs and pipes, use 91%+ isopropyl alcohol combined with coarse sea salt as a gentle abrasive. Swirl gently for 2–3 minutes.
Rinse thoroughly with lukewarm water until completely odorless. Never shock hot glass with ice water to avoid thermal micro-cracking.
Soak smaller glass accessories in a sealable bag with alcohol and rinse weekly to maintain optimal percolation and clean airflow.


