10 sheets of pre-punched card to provide you with multiple press-out mounts. The pack contains one each of the following colours: Celestial Blue, Cream Vellum, Daffodil, Deep Blue, Jade, Lime Green, Orange, Red, Sunlight Yellow & White. Mount sizes are: 125 x 175mm, 200 x 250mm, 250 x 300mm, 300 x 400mm, 400 x 500mm, 513 x 638mm, 525 x 650mm.A total of 60 mounts in total. Also included is a sheet of greyboard 530 x 660mm, ideal to be used as a picture mounting board.380 microns.