Hi Phill, the Y2370 33pc set [now obsolete] was supplied with Euro style air hose connectors. You can either stay with these or change over to PCL type depending on your requirements [Amtech stock code Y0415]. To answer your question correctly, you would need to purchase compatible quick coupler connectors [Amtech Y0420]  to suit your airline diameter and style of air hose connectors. if you have purchased an airline with connectors pre-fitted, then you may want top stay with compatible ones to those. Remember its best to use an in-line oiler and drain your water tap regularly.