Made of oriented polystyrene Contains no agents that might be harmful to postage stamps Special foil will not shrink or discolor It is 100% waterproof and is proven safe for stamps
U.S. Souvenir Sheets thru SIPEX except To Fit Space Explor. Black Back or Clear 1-mount 92x92 2-mounts 184x127 2-mounts 127x184 5 Mounts per package
