When sourcing, you must distinguish between Nylon Monofilament (single strand, high transparency, ideal for gill nets) and Nylon Multifilament (braided or twisted strands, high tensile strength, ideal for trawls and cast nets). Ensure the denier or twine size matches your target fish species; for instance, 210D/3 to 210D/120 are common specs for multifilament. Additionally, verify if the net is Depth Way Stretched (DWS) or Length Way Stretched (LWS), as this affects how the meshes open in the water.