The STI 14200NR-Z003 Universal Stopper Housing and Quickstop Fire Sprinkler Tool from Safety Technology International is designed to help stop water flow from fire sprinklers when a fire is not present. It clamps shut over 1/2" and 3/4" sprinkler heads and is lightweight yet durable, tested to withstand pressures up to 350 PSI or 2400 KPA. This versatile tool works with various sprinkler types, including upright, pendant, sidewall, intact, damaged, recessed, or sheared. Additionally, its cover offers storage space and protection against vandalism and accidental damage, measuring 6 in H x 4.1 in W x 3.2 in D.