GE Q Line THQL 15 Amp 1 Pole Dual Function Afci Gfci Circuit Breaker Item #5388934 Model #5478304 high velocity duct sealant for commercial high velocity duct sealant for commercial and residential supply and return air duct use Slip feature allows for two inches of rigid copper or CPVC pipe to be cut out of an existing line and connected back together with the Disconnect Clip to slide the fitting back to the other end of pipe Unit’s last known trip condition can be cleared by performing a series of functions provided in the instructions DFCI has a Self Test feature that meets a June 2015 requirement from UL on all Ground Fault circuit breakers