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1.The inside of the pipe must be cleaned, the surface is flat, and there is no burr. Otherwise it will affect the sealing effect and even pierce the airbag
2.The airbag must be used in the same type pipe
3.Do not use the air bag at the pipe joint, there is a gap at this place, which affects the sealing effect.
4.Do not use overpressure.
The air mail is cheapest post way, so it take a long time. If you don't want to wait so long time, you can choose the Express mail or don't buy it. ( Express mail of EMS or DHL, it takes approximately 4-12 workdays. Please pay for the express mail fee. But Russian Federation will whit SPSR : 6-12 business days . )
UPS, Fedex are not recommended , which is expensive, please contact us .

