Manufacturer 시리즈 = FBN-50 To Fit Bore Size = 50mm The Festo flange mounting FBN-50 For DSNU and ESNU cylinders. It has corrosion resistance classification CRC 1 that is low corrosion stress.Thread Size 50 Product weight 292 g Materials note (* Free of copper and PTFE, * Conforms to RoHS) Material mounting (* Steel, * Galvanised)