Supplies · Binding combs & covers · RAYSON
RAYSON 21-Ring A4 Plastic Binding Combs (100, assorted sizes)
By Seb Clark, Editor, UniDoc Solutions·Updated
Standard 21-ring combs fit every A4 comb binder — buy a mixed pack until you know which sizes you use.
10–14p per bound document.
Fits these models
Compatibility checked against the manufacturer's own listing: source . Always double-check your exact model number before ordering.
Our take
A4 comb binding is a single standard: 21 rings at 14.28 mm pitch. Any comb fits any machine in our guide; what varies is diameter (6 mm binds ~20 sheets, 12 mm ~90, 25 mm ~200). This RAYSON pack mixes sizes so you can bind anything from a 10-page handout to a 200-page manual, and it's the best-reviewed comb listing on Amazon UK. Once you know your usual thickness, buy that size in bulk.
Manufacturer highlights
- Rayson plastic binding comb is designed for binding pages together with any standard 21 loops plastic comb binding machine
- Max. binding capacity: 20 sheets; Diameter: 6mm; Number of rings: 21
- Available to bind 2-20 page documents, ideal for binding presentations, reports, books etc
- High quality, PVC resins ensure that combs won't chip, scratch, peel or discolour
- With a comb spine, pages lie flat for convenient note taking and photocopying and it’s simple to add or remove pages by comb binder machine
Genuine vs compatible — which should you buy?
Genuine cartridges cost more per page but carry the maker's warranty, hit the quoted page yield reliably, and never trip firmware "unrecognised cartridge" blocks.
Compatible (third-party) cartridges are typically 40–70% cheaper. Quality is fine from reputable sellers, but yields are optimistic, colour accuracy varies, and some brands (HP with HP+ in particular) actively block them. For a mono laser printing text, compatibles are usually the sensible buy; for colour or warranty-critical kit, stay genuine.