Robuta

https://store.astm.org/f1099m-98.html F1099M Standard Specification for Rat Guards, Ship's (Metric) standard specification rat guards ship metric https://www.repository.cam.ac.uk/items/51027d48-4523-44d0-8328-e46db5cc803c Two bifid tin rat-guards each fixed to the rope passing though it near one of its margin.