Terp Pearls 6mm — 10 Pack Review

Terp pearls are one of those accessories that look like a gimmick until you try them — and then you never dab without them again. The concept is dead simple: drop one or two small glass balls into your quartz banger before you heat it. When you cap the banger and inhale, the airflow spins the pearls inside the bucket, continuously spreading the hot oil across the quartz surface. The result is more even vaporisation, better flavour from lower-temperature dabs, and less oil pooling and burning onto the floor of your banger.

Size and Compatibility

These are 6mm borosilicate pearls, which is the sweet spot for most standard 14mm and 18mm bangers. For smaller bucket bangers (20mm or less), you might want 4mm pearls instead. For regular 22-25mm buckets, 6mm is perfect — two pearls spin freely without jamming. The borosilicate glass is the right material choice: it's inert, won't react with your concentrates, and can handle the thermal shock of going from room temperature into a hot banger. Rubies and sapphires conduct heat better, but at £5.99 for 10, borosilicate is the obvious starting point. Check our dab accessories page for matching carb caps and bangers.

How to Use Them Properly Step-by-Step

My method is simple and I never deviate from it. I drop one or two pearls into the cold banger before heating — never into an already hot bucket, as that thermal jump is asking for trouble. I heat the banger with the pearls inside, wait for the glow to fade, then load the dab, cap it, and inhale with a slow, steady draw. The restricted airflow under the cap is what gets them spinning. If you are still dialling in heat timing, our dab rig guide covers the full sequence. Two pearls spin better than one in my experience; three tends to jam in anything under a wide bucket.

Technique Tips for a Proper Spin

The carb cap matters as much as the pearls. I get the best spin with a directional or bubble cap, angling the airflow to one side so it drives the pearls around the bucket like a whirlpool. Hard, fast pulls stall them; slow and steady keeps them moving. I run mine in the RORA 25mm banger where two 6mm pearls have room to travel, and the difference in flavour at lower temperatures is obvious — the oil spreads instead of sitting in a puddle and scorching. If your pearls barely move, the usual culprit is too big a bucket for the cap, or drawing too hard.

Cleaning and Maintenance

I fish the pearls out with tweezers once everything has cooled — never with fingers on a hot banger — and soak them in warm isopropyl alcohol when they start to haze. A short soak brings borosilicate back to crystal clear. The beauty of this £5.99 10-pack is that spares are always on hand; pearls are tiny and love to roll under furniture, so I keep a few in a small silicone tub. With basic care a single pair lasts me ages, and the rest of the pack sits as backup.

Terp Pearls FAQ

How many pearls should I use?
Two 6mm pearls is the sweet spot for most standard and wide buckets. One works but spins less reliably, while three or more tend to jam unless your bucket is genuinely large.

Why are mine not spinning?
Almost always airflow. You need a carb cap that restricts and directs the draw, plus a slow, steady inhale. Drawing too hard pins the pearls in place instead of letting them travel.

Will they damage my quartz banger?
Borosilicate pearls are softer than quartz and I have never had one mark a bucket. Drop them in cold and heat together rather than dropping cold pearls into hot quartz, and they will be gentle on the glass.