The IBC water tank adapter is designed for Heilwiy S60X6 thread, the hose can fit 20mm / 25mm / 32mm hose. The S tank adapter fits any hose with an outer diameter of 20 mm/25 mm/32mm Optional S60X6 adapter made of impact resistant plastic made from quality materials. If your tank cap is not an S60X6 (about 20% are not), you can purchase a thread converter that will convert the thread to the S60X6 you need. An ideal tank adapter for Heilwiy outdoor and indoor, not only for Heilwiy your garden, but anywhere you need the hose. These IBC adapters fit most standard UK and European IBC containers where the end-to-end thread is a coarse S60X6 thread. An S60X6 thread measures 60mm in diameter from thread edge to thread edge and has a 6mm pitch (distance between threads).