Diamond PerfectMark marker pens

The Diamond PerfectMark is a permanent laboratory marker ideal for all applications of laboratory marking. 
The marker is waterproof, smear-resistant, odourless and fade-resistant. Most laboratory chemicals & solvents are resilient to the permanent ink. 
It also contains a fine tip intended for use in tight spaces such as cassettes for histology, microscope slides and cryogenic vials.