Upper Φ161×18 Lower Φ159×41 Connection hole:25*22.1 Glycerine hole:Φ12 With explosion proof hole:Φ25 we has successively established cooperation with Wika、 Ashcroft, CSE, JUMO 、Weiss Group、Watts、SENSMAR, and so on, which won itself a larger market shares.We are located in Hangzhou Fuyang Changkou New Area, near from Changshen Highway and adjacent to Shanghai, Ningbo. With such a blessed location.