Virtually indestructible binders, ideal for manuals. Tough polypropylene spines & sides in bright colours with black covers. 8 cross-over prongs making 4 rings. GLX are extra wide for use with punched pockets. Double recesses in spines make binders easy to grip. Removable label holder allows labels to be easily changed. Holds up to 400 A4 sheets. Matt black prong fitting. GLX 4 Ring (8 crossover prongs).