Silent Gliss is the leading global supplier of premium interior window treatment systems, you can be sure to trust the very well-known brand! They manufacture the world's quietest, smoothest gliding bespoke curtain track systems. 'Silent' Gliss are true to their name in the 1950's they produced their first silent track by combining nylon gliders with an aluminum track. They still use this technique to this day! Each Silent Gliss track is made to order and therefore non-returnable. For in-between widths simply purchase the size up then specify the exact width you require in centimetres in the 'Comments' box at checkout. Your order will then be made to your exact width!