Terma aims to be as creative as possible with its towel rail design hence Crystal has been manufactured with all diamond shaped bars. Crystal is very popular in the UK as current bathrooms are trending with square profile taps and shower heads and the diamond shaped bars on Crystal are a nice compliment to that style. This is perfect for family bathrooms or utility rooms due to the multiple wide spaced gaps for hanging both towels and clothes. Crystal has a gap of 63mm from the back of the bars up to the wall so perfect for feeding towels into. RAL 9016 has a silk, smooth texture. Terma offers a 150x50mm colour chip of this finish should you wish to see the colour prior to purchase. Crystal can also be fitted as dual fuel - whereby it can run on the central heating in the winter and as electric in the summer. You simply need a Terma heating element and the Terma Integrated Valve with Immersion Tube (no T piece required with this valve) to easily install as dual fuel (840h = 200w, 1200h = 400w, 1560h = 600w element)