The AM-4 Full Kit (AM4-FKIT) has an AM-4 Aluminium Hand-piece and 50mm head with a adaptor ring & 31 nozzles. It’s been designed for cleaning hose, tube and pipe sizes ranging from Hose ¼” – 2″, Tube 3/16 to 2″, BSP fittings ¼” – 1¼” and JIC hydraulic flared and invert tapered fittings ¼ – 2 “. The New interlock mechanism on the head & hand-piece make it easy to attach and remove the head with reduced weight so easy and comfortable to use.