"ZAP BAC" Antibacterial 5/16" Green Health Spout
"ZAP BAC" Antibacterial 5/16" Green Health Spout. This spout contains silver nano-particles designed to help prolong the life of a tap-hole. It is recommended to replace these spouts every 3 years. This spout is for 5/16" tubing and it is recommended to use a 5/16" drill bit.