KDV-PK-4 Terminal socket sold in multiples of 10 only

Terminal Socket Kdv-Pk-4 for Multi-Tube Connection of Plastic Tubing with 2, 3 and 4 Mm Id. Nominal Size=3,4 Mm, Operating Medium=Compressed Air In Accordance with Iso8573-1:2010 [7:-:-], Note On Operating and Pilot Medium=Lubricated Operation Possible, Corrosion Resistance Classification Crc=1 - Low Corrosion Stress, Pneumatic Connection=For Tubing Outside Diameter 6 Mm