![#21 Disposable Scalpel Blades 100/box , Sterile, Carbon Steel Blade](http://a2zscilab.com/cdn/shop/products/6koFmno_7392d007-f916-4d3b-8a97-ea5bca123cb7_{width}x.jpg?v=1645675394)
The No.21 is a large version of the No.10 blade with a curved cutting edge
and a flat, unsharpened back edge.
Larger than the No.20 but smaller than the No.22
Individually sealed in foil to maintain sterility.
Fits handles 4, 4L, 4 Graduated & 6B.