Beal Rope Marker
Here's what other sites are saying:
Beal has developed a special ink for marking ropes, in the middle as well as at the ends. The Beal Rope Marker is water resistant, and stands up to abrasion well.
Stay safe in the vertical world by maintaining your current center mark or adding a new one when necessary. The Beal Rope Marker keeps you current on rope geography so you don't find yourself in an easily-avoidable dangerous situation.
On Sale. Beal Rope Marker (Fall 2009) The Rope Marker by Beal hardly stiffens the rope, is water resistant, and stands up to abrasion well. NB : it does not affect polyamide.The container has a small roller at the tip for better inking.