#21 Disposable Scalpel Blades 100/box , Sterile, Carbon Steel Blade

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.