Glass Adapter Grommets – 10mm, 14mm & 18mm Size Conversions | Universal Bong & Rig Fittings

Upgrade, repair, or customize your setup with these premium glass adapter grommets, designed to convert between popular joint sizes for bongs, dab rigs, bowls, and accessories. Whether you need to size up, size down, or fit mismatched joints, these adapters provide a seamless, airtight connection.

Made from durable borosilicate glass with frosted joints for a secure grip, they are essential tools for any smoker or dabber looking to expand compatibility across multiple pieces.

Available Adapter Options

• 10mm Male → 14mm Female GrommetAllows 10mm rigs to use 14mm bowls, nails, or bangers.

• 14mm Male → 18mm Female GrommetPerfect for upgrading to larger 18mm accessories.

• 14mm Female → 18mm Male GrommetAdapts smaller joints to fit 18mm female bongs or downstems.

• 18mm Female → 14mm Male GrommetReduces 18mm joints so you can use 14mm bowls or quartz bangers.

Key Features

• High-Quality Borosilicate GlassHeat-resistant, durable, and designed for long-term use.

• Frosted Ground JointsCreates a tight, reliable seal with no wobble.

• Universal FitWorks with most standard glass bongs, dab rigs, bowls, downstems, and quartz bangers.

• Easy Size ConversionInstantly expand compatibility across all your glass pieces.

• Compact & Simple to UseSwap in seconds—no tools required.

Specifications

• Material: Borosilicate glass

• Joint Options:

• 10mm Male → 14mm Female

• 14mm Male → 18mm Female

• 14mm Female → 18mm Male

• 18mm Female → 14mm Male

• Style: Frosted joint adapters