Testifire 1000-001 Smoke and Heat Head UnitPlease note: This product is now obselete and has been replaced by the Testifire XTR2 Testifire 1000 001 Smoke and Heat Detector Tester Head Only: Your Ultimate Safety Solution At Fire Trade Supplies, we understand the importance of protecting your world from potential fire hazards. That's why we're proud to present the Testifire 1000 001 Smoke and Heat Detector Tester Head Only, a superior product in our Testifire Equipment collection. This multi