Zhenjiang Matchau Marine Equipment Co.,Ltd is one of the leading China bobbin manufacturers, welcome to wholesale cheap bobbin from our factory.The Bobbin Assembly is designed to disintegrate when exposed to water. This allows the mechanism to puncture the CO2 cylinder and fill the inflatable chamber. The Bobbin is water sensitive material, once get in touch with water it must be replaced with a new one for next use. Keep it at dry and normal temperature place. It is printed the manufacture date, Life time is 2years.