These materials are ideal for repairing of Light leaks on backdoors and SLR's mirror cushion.
The size is 10cm x 20cm (4" x 8"), Thickness is 1mm 1.5mm 2mm 2.5mm 3mm (each 1 piece)
Material is Moltopren made of INOAC( http://www.inoac.co.jp/ : the most famous Japanese foam manufacturer) which is almost the same material with your camera's original light seals foam .
Most of all Japanese camera manufacturer use Inoac's foams. High Quality.
Please refer installation page to know how to install foams.
The price is 10 USD.