Individual sub-base NAU-1/4-1B-ISO With port pattern as per DIN ISO 5599/1, external dimensions as per VDMA 24345, connections underneath. Conforms to standard=ISO 5599-1, Authorisation=UL - Recognized (OL), Mounting type=with through hole, Auxiliary pilot air port 12/14=G1/8, Pneumatic connection, port 1=G1/4