These slides are made from premium hand pulled borosilicate tubing. Each slide is approximately 4mm thick and (72mm) long. Hot Tooth is double-layered color with an opaque interior white color, and transparent outer layer that changes to bright pink when exposed to UV/black light. These are great slides rocking for with keys, and warming up the blues. The tone is overall balanced.  These slides are also available in our (33mm) Lead Collection.