Gbc polycovers a4 clearview binding covers polypropylene 300 micron frosted pack 100 product description gbc polycovers a4 clearview binding covers polypropylene 300 micron frosted 1 x pack of 100 binding covers durable polypropylene frosted clear report cover 300 microns thickness made from environmentally friendly polypropylene 100 percent pvc free 300 micron thickness size a4 frosted transparent boxed 100 covers features durable polypropylene frosted clear report