Manufacturer 시리즈 = FBN-40 To Fit Bore Size = 40mm The Festo flange mounting FBN-40 For DSNU and ESNU cylinders. It has corrosion resistance classification CRC 1 that is low corrosion stress.Thread Size 40 Product weight 191 g Materials note (* Free of copper and PTFE, * Conforms to RoHS) Material mounting (* Steel, * Galvanised)