Air Pump Drain Unblocker Heavy Duty,High Pressure Toilet Plunger Sewer Dredge Cleaning Tool, Sink Unblocker with 4 Suckers for Kitchen Bathtub ShowerHow to Use: 1. Install the appropriate plug according to the size of the pipe diameter. 2. Pump up the hand pump about 12 15 times, until could not pump into the air to get high pressure gas. 3. Block the outlet of the pipe and seal it with plastic film; Pull the trigger to release the high pressure gas.(you could have it repeated till dredge the pipeline.) Specification: Color: Blue Material: ABS Gun Body Weight: 800 g Size: 11. 2(L) x 12. 6(W)inch