Understanding ROOR® Joint Sizes

Choosing the correct accessory for your ROOR® starts with understanding joint sizes. Whether you're replacing a bowl, upgrading a downstem, or adding new accessories, knowing your joint size helps ensure proper fit and performance.

What Is a Glass Joint?

The joint is the connection point where accessories such as bowls and downstems attach to your glass. Modern ROOR® pieces use precision glass-on-glass joints designed for durability, airflow, and secure fitment.

The Most Common ROOR® Joint Sizes

The two most common joint sizes found on ROOR® pieces are:

• 14.5mm Joint
• 18.8mm Joint

These measurements refer to the diameter of the glass joint where accessories connect.

14.5mm Joints

14.5mm joints are commonly found on smaller and medium-sized ROOR® pieces. They offer excellent airflow while maintaining a compact design.

18.8mm Joints

18.8mm joints are often found on larger ROOR® pieces and collector builds. The larger opening allows for increased airflow and compatibility with larger accessories.

Male vs Female Joints

Understanding whether your piece uses a male or female connection is just as important as knowing the size.

• Male Joint: Inserts into a female connection.
• Female Joint: Receives a male accessory.

Most ROOR® bowls use a male connection that inserts into a female joint on the piece.

Why Proper Fit Matters

Using the correct joint size ensures:

• Proper airflow
• Secure accessory fitment
• Optimal performance
• Reduced risk of accidental damage

Before Ordering Accessories

Always verify:

• Joint size (14.5mm or 18.8mm)
• Male or female connection
• Downstem compatibility
• Accessory specifications

Need Help Finding the Right Fit?

Browse Shop All ROOR® Glass, explore ROOR® Classics, view ROOR® Tech, or discover Custom ROOR® Builds.