The bowl is made of quartz glass which is in comparison with borosilicate glass durably heat-resistant - the heat is kept better and longer. Signs of wear which show with borosilicate glass when heated very hot and used very often are not to be expected as quartz glass shows little thermal expansion and high thermal shock resistance.
Solely the oil nail should be heated to prevent burns.
More information about smoking oil or essence you will find at this infopage.
|Standard grinding||SG (female) 10F + 14F + 19F|