You've probably noticed that dab rigs come in different sizes with different connection points. Those connection points—called joints—need to match your banger (the nail). Understanding joint sizes and types means you can shop confidently and avoid buying incompatible equipment.
What Is a Joint?
A joint is simply the connection point where your banger attaches to your dab rig. It's the interface that holds your nail securely while allowing heat and vapor to pass through.
Two things matter: size (how thick the glass is) and angle (whether it's vertical or angled).
Joint Sizes
Joint sizes are measured in millimeters and refer to the outer diameter of the male joint. The female joint (on the rig) is slightly larger to accommodate it.
10mm Joints
These are the smallest standard joints. They're common on beginner and portable rigs.
Characteristics:
- Smallest footprint
- Lower heat capacity (they cool faster)
- Great for portable/travel rigs
- Sometimes harder to find bangers for
- Less stability with heavy bangers
Best for: Portable dabbers, minimalists, light users
Banger fit: Relatively tight connection; need to be careful not to force it
14mm Joints
14mm is probably the most common size for dab rigs. It's the standard you see everywhere.
Characteristics:
- Perfect balance of size and stability
- Wide variety of available bangers
- Good heat capacity
- Affordable bangers and accessories
- Works with most carb caps seamlessly
Best for: Most people; it's the standard for a reason
Banger fit: Comfortable, not too tight or loose
18mm Joints
These are larger and typically found on bigger rigs or rigs designed for more aggressive dabbing.
Characteristics:
- Large, stable connection
- Excellent heat capacity
- Heavier bangers fit securely
- Fewer banger options (less common)
- More expensive accessories
- Less portable
Best for: Large rigs, frequent heavy dabbers, people who prioritize stability
Banger fit: Loose connection; requires careful handling
Joint Angles
Beyond size, joints come at different angles. This affects how your banger sits and how your carb cap seals.
90-Degree Joints
Also called "straight" joints. The connection is perpendicular to the rig body.
Characteristics:
- Most common angle
- Easier to cap (cap sits naturally on top)
- Better airflow angles for most users
- Universal compatibility (works with most rigs)
Best for: Most dabbers; if unsure, get 90-degree
45-Degree Joints
The joint is angled, making the banger tilt at 45 degrees.
Characteristics:
- Better for ergonomics (angles toward you slightly)
- Harder to cap securely (cap sits at an angle)
- Less common, fewer banger options
- Unique aesthetic
Best for: People with specific ergonomic preferences, experienced users who know their setup well
Understanding "Male" and "Female"
This can be confusing. Here's the simple version:
Male joint: The part that goes INTO another piece. The banger has a male joint.
Female joint: The part that RECEIVES something. The dab rig has a female joint.
When you buy a banger, you're buying something with a male joint. When you look at your rig, the opening where you plug the banger in is a female joint.
Common configuration: 14mm male banger + 14mm female joint on rig = compatible.
Material Considerations
Bangers are made from different materials, and compatibility is important:
Quartz bangers: Most common, work with all joint types, affordable
Titanium bangers: Durable, work with all joints, slightly more expensive
Ceramic bangers: Work with all joints, same compatibility as quartz
Borosilicate glass bangers: Rare but available; same compatibility
The material doesn't matter for sizing—all materials come in all standard sizes.
How to Determine Your Rig's Joint Size
Method 1: Ask the retailer. Honestly, this is easiest. If you bought it from a shop, call or check your receipt.
Method 2: Compare to known sizes. If you have a banger that fits, you know your size.
Method 3: Measure it. Use a caliper or ruler to measure the outer diameter of the female joint on your rig. That's your joint size.
Method 4: Look at the rig specs. Most retailers list joint size in product descriptions.
Buying Your First Banger
If your rig is 14mm/90°: You're in luck. This is the most common configuration, and bangers are plentiful and affordable.
If your rig is 10mm or 18mm: You'll have fewer options, but they do exist. Check before buying.
If your rig is 45°: Make sure the banger you're buying explicitly says 45-degree compatibility. Don't assume.
Common Compatibility Mistakes
10mm vs 14mm: They look similar but don't mix. A 10mm banger won't fit a 14mm rig, and vice versa.
Angle confusion: A 90-degree banger won't properly cap a 45-degree rig, even if the size matches.
Counting your joint: Make sure you're counting correctly. Look at the opening where the banger goes, not the water chamber.
Upgrading Your Banger
If your current banger is worn out, you have options:
Match your current size: Buy the same size/angle you have. Easiest approach.
Upgrade material: Switch from a cheaper banger to higher-quality quartz or titanium.
Experiment with angles: If your rig has 90-degree, you can't switch to 45-degree without changing the rig. But if you ever get a new rig, now you know other angles exist.
The Right Fit Matters
A banger that's too loose will:
- Leak air during dabs
- Make capping impossible
- Move around during heating
- Deliver inconsistent dabs
A banger that's too tight will:
- Be hard to remove
- Risk breaking if you force it
- Trap heat differently (affects consistency)
The right fit slides in with gentle pressure and sits flush against the rig without gaps.
Future-Proofing Your Setup
If you're buying your first rig, 14mm/90-degree is the safest choice. It's the standard, bangers are cheap and plentiful, and you'll never have trouble finding accessories.
If you already have a different configuration, you now know your options. Joint size is one of the few truly fixed aspects of your rig—you can't change it without changing the rig itself.
