Single flare Borosilicate glass tunnels. orings included. available from 8g-1".
WHEN COMPARED TO REGULAR GLASS, BOROSILICATE IS SAFE FOR INITIAL PIERCING, RESISTANT TO CHEMICALS, SCRATCH-RESISTANT, LESS SUSCEPTIBLE TO FRACTURES, RESISTANT TO THERMAL SHOCK, AND NOT POURED INTO MOLDS. ALL OUR GLASS IS HANDCRAFTED IN ST. LOUIS, MISSOURI.
