The 'Nut' shaped end (which connects to the Mixer tap or shower) is a 1/2"BSP one. The other end, which connects to the Shower head also UK standard 1/2"BSP but has a longer conical shape to it so it can slot down into a holder.
GIONAR Stainless Steel Flexible Tap Hose for Kitchen Tap & Shower Hose Extension, Flexi Pipe for Bathroom,Tap Flexible Hose(60cm)
DOJA Industrial | Flexible Tap Hose | Male/Female | M 3/8" - F 3/8" | Pack 2 | 40 cm Length | Hose for Tap or Shower in Stainless Steel | Flexi Hose Pipe for Kitchen tap, Shower Hose, tap Connector
DOJA Industrial | Flexible Tap Hose | Male/Female | M 1/2" - F 1/2" | 40 cm Length | Hose for Tap or Shower in Stainless Steel | Flexi Hose Pipe for Kitchen tap, Shower Hose, Bathroom tap...
DOJA Industrial | Flexible Tap Hose | Male/Female | M 3/8" - F 3/8" | 20 cm Length | Hose for Tap or Shower in Stainless Steel | Flexi Hose Pipe for Kitchen tap, Shower Hose, Bathroom tap...
ENKI, H13, Shower Hose, English Gold, Flexi Bathroom Shower Head Hose Pipe Replacement, Large 11mm Bore Diameter, 150cm Length, Modern or Traditional Bathroom Design
Hudson Reed Shower Hose 1.5 Metre Modern Gold Black Chrome Flexi-Hose Bathroom