DOMELESS grade 2 Titanium Nail.
Fits in 19mm female joints and it can also be used on a 14mm male. The height of the Spinning bowl and the ridges reduce heat transfer to the base and protect your glass. No clogging at all as it has a wide take-in chimney. As the name says, it's a domeless nail it doesn't need a glass dome to be used.
Titanium Nail For 19mm Females & 14mm males