Net Weight: 2.5 oz.Convenient, Easy And Safe Product To Test The Functional Ability Of A Smoke DetectorSmoke Test Also Checks For Obstructions From Debris Which Clog Detector Vents And Prevent Smoke From Properly Entering The Sensing ChamberSpray Extends Up To 6' Allowing Testing To Be Done While Standing Safely On The FloorTester Good For Both Residential And Commercial Smoke Detectors