Biodegradable Cotton Twine 3mm, 1kg Spool Cotton twine/degradable twine with a thickness of 3mm, supplied in a 1000g spool. This twine is designed for use in pots/traps intended for the capture of  king crab ,  lobster ,  brown crab , and  fjord crayfish . The twine is biodegradable and environmentally friendly, meeting the requirements from the Directorate of Fisheries for sustainable fishing gear. Remember, it must be installed in traps in accordance with the applicable regulations for fishing equipment.