This light weight extension pole concentrates the spray, bringing the nozzle right to the test point for total accuracy. Just slip the patented plastic ring on the 2.5oz (25s) Smoke Detector Tester™ can, insert the 18-inch tube, and go. We recommend the use of our 1490 Adapter whenever you use Smoke Detector Tester™. You will get more tests per can, and you will overcome many job site problems, especially when testing in areas where there are turbulent air conditions. The 1490 Adapter improves your aim and accuracy, enhancing product economy as well. Each time you take aim you can be sure you have made your facility safe for employees and visitors alike. Features: Directionalizes aerosol to exactly where you want to spray Prevents spraying to closely to detector Provides an additional 18" of extended reach Not compatible with Enclosed Delivery Equipment Delivery Test Equipment Extension Poles Instructions: Place round cap on aerosol can security over can rim Add tube to cap Place can in N-30 clip