Color classification in Mainland China: CP-180, CP-700, CP-700-2, CP-700A, CP-700B Product Features: Sealed integral oil cylinder can effectively avoid the disadvantages of oil leakage and improve the overall safety performance; Tighten the oil return valve clockwise when working, loosen it counterclockwise when relieving pressure; The tubing is high pressure tubing with zG3/8 thread for quick connection. According to customer demand, additional seismic pressure gauge, at any time to observe the pressure change