Keylite® windows are categorised in 3 ways, Old Timber, New Timber and Polar frames. The window code stipulates the type of window you have. It's crucial that the correct code is ordered for your blind. For example, a T01 code will not fit on a 01 code window. Look for these plates on the window frame to confirm your window code. 

THIS LINK TO SUBMIT YOUR SIZES AND WE WILL BE IN TOUCH SHORTLY.

Old Timber	New Timber	Polar

The product plate will look something like this. Note down the code as illustrated below. A letter/number / letter sequence.