Black double loop wire on spools

Black metallic bookbinding rings, spool of 122.000 loops, diameter 4,80mm = 3/16", 3 perforations/per thumb (step 3/1), 1 spool contains roughly 3588 A4 bindings, use-able for documents with a thickness between 5 and 16 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 84.000 loops, diameter 6.40mm = 1/4", 3 perforations/per thumb (step 3/1), 1 spool contains roughly 2470 A4 bindings, use-able for documents with a thickness between 16 and 25 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 60.000 loops, diameter 7.90mm = 5/16", 3 perforations/per thumb (step 3/1), 1 spool contains roughly 1760 A4 bindings, use-able for documents with a thickness between 26 and 45 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 43.000 loops, diameter 9.50mm = 3/8", 3 perforations/per thumb (step 3/1), 1 spool contains roughly 1264 A4 bindings, use-able for documents with a thickness between 46 and 65 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 32.000 loops, diameter 11.10mm = 7/16", 3 perforations/per thumb (step 3/1), 1 spool contains roughly 941 A4 bindings, use-able for documents with a thickness between 66 and 85 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 24.000 loops, diameter 12.70mm = 1/2", 3 perforations/per thumb (step 3/1), 1 spool contains roughly 705 A4 bindings, use-able for documents with a thickness between 86 and 95 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 19.300 loops, diameter 14.30mm = 9/16", 3 perforations/per thumb (step 3/1), 1 spool contains roughly 567 A4 bindings, use-able for documents with a thickness between 96 and 110 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 10.500 loops, diameter 15.80mm = 5/8", 2 perforations/per thumb (step 2/1), 1 spool contains roughly 455 A4 bindings, use-able for documents with a thickness between 111 and 130 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 7.000 loops, diameter 19.00mm = 3/4", 2 perforations/per thumb (step 2/1), 1 spool contains roughly 304 A4 bindings, use-able for documents with a thickness between 131 and 150 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 5.000 loops, diameter 22.20mm = 7/8", 2 perforations/per thumb (step 2/1), 1 spool contains roughly 217 A4 bindings, use-able for documents with a thickness between 151 and 180 sheets of 80gr/m².

Black metallic bookbinding rings, spool of 4.500 loops, diameter 25.40mm = 1", 2 perforations/per thumb (step 2/1), 1 spool contains roughly 195 A4 bindings, use-able for documents with a thickness between 181 and 200 sheets of 80gr/m².