DOMELESS grade 2 Titanium Nail.
Fits on 14mm male joints and although not the best suggestion, it can also be used in a 19mm female. The ridges distribute heat in order to reduce 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 14mm Males & 19mm Females