... 100% Nylon6 Size:2.50mmx15m Pack: double blister economic grade durable and long lasting Nylon Trimmer Line Size ... Economic Grade, Commercial Grade, Professional Grade.6. Packing: card head, loops/donut, blister card, blister packing, openly packing/ in bulk, spool, bag, ... 5 pounds/spool, 500gs/bag, 1 LB blister donut ,etc ...