This product consists of a paper mask for the clear glass areas of the Airfix Bristol Blenheim Mk. I in 1/72 scale. It is made up on a small yellow sheet of masking paper, with the masks outlines cut into the paper. There are masks for all of the windows, the turret, and also for the hubs and wheels, depending upon how you want to paint them. They can be easily detached with a pair of pointed tweezers, and do not bunch up, so that the mask is perfect on all sides. The mask adheres to the plastic, and when painting and weathering are completed, all you need to do is remove the mask, again with a pair of pointed tweezers, and Presto! Your windows are perfectly masked.
These will save a lot of work, especially if you use the “cut masking tape” method as I have always done. You’ll save about an hour’s work, and the results will be superior. Highly recommended.