1/2 BSP thread standard connection to shower head and mixed water supply
Square section pipe 22mm x 22mm
Ceiling plate 50mm x 50mm
Manufactured by Flova for the Ixia brand - Ixia VS120 Square Design Ceiling Mounted Shower Arm
Flova are an established name in the manufacture of Top Quality and Reliable Bathroom Taps and Showers, Flova have also produced their very high quality products for own brands such as Ixia.
Female (socket) 1/2 BSP thread measures 19mm across, Male 1/2 BSP thread measures 21mm across (diameter).