Home / Agriculture / Joiner Joiner Size: 4mm X 5mm Suitable for PVC Tubing Size: 6/4mm & 7/4mm Related products Hydroponic 4″ X 2″ Rectangular Pipe Elbow 90deg 4″ X 2″ Open Trunking Pipe Socket Soil Plug 4″ X 2″ Rectangular Pipe End Cap 47mm Garden Tray – 40 holes LDPE Tubing Pipe