Foot mounting HBN-20/25X2 For cylinders ESNU, DSNU, ESN, DSN, EGZ and sensors. Size=20/25, Corrosion resistance classification CRC=1 - Low corrosion stress, Product weight=237 g, Materials note=(* Free of copper and PTFE, * Conforms to RoHS), Material mounting=(* Steel, * Galvanised)