Structure: The packer is composed of four parts, inflatable rubber hose, steel tube, safty valve, quick coupling . It's widely used to transfer resin, water cement and other media . Our inflatable rubber hose make from high quality NR syntheic rubber , which is resistant to abrasion , weather, ozone and with good inflation range . Sealing Aperture : 25mm- 155mmInflatable area :24mm- 160mmInner Diameter :10mm102mmOutside Diameter :24mm - 128mmWorking Pressure : 5Mpa - 8MpaTest Pressure :6Mpa - 30MpaBurst Pressure : 12Mpa - 40Mpa