The standard size head is commonly used by boat manufacturers including Quicksilver, Beneteau, Jeanneau etc..
The head has a 1/2" BSP thread for connecting it to the hose.
The handle allows for adjustable water flow.
The head has a loop at the top to allow it to be hung from a hook.
DIMENSIONS
Height (measured top to far end of thread, excluding hanger): 96mm
Diameter of shower head: 30mm
Thread: 1/2" BSP
Dimensions +/- 2mm