Scalpel Blade for No. 4 Holder

These scalpel blades fit the No. 4 scalpel handle and come in boxes of 100. Choose size 20, 21, 22, 23 or 24 from the drop-down.

Every blade has its size stamped on it, so you can tell them apart at a glance once they're out of the box. Sizes 20 to 24 are the larger blade pattern, which is why they need the No. 4 handle and won't fit the smaller No. 3.

They're used for dissection in school and university biology labs and for general cutting work in the lab. For the smaller blade range, see our scalpel blades for the No. 3 holder.