Standard backing line:BL-1, BL-3 (25lb, 100m)Fly line backing, braided terylene monofilament, anti-tangle, rot proof, fluorescent, hollow for easy fitting, fluorescent.Packing: one continuous line in 100m to 4 spools, 25m for each spoolBL-2, BL-5 (25lb, 100m)Braided, monofilament, backing line, anti-tangle, and rot proof, hollow for easy fitting. Packing: one continuous line in 100m to 4 spools, 25m for each spoolBL-4 (25lb, 100m)Twisted nylon, backing line, rot proofPacking: one continuous line in 100m to 4 spools, 25m for each spoolSuper slim super strong backing line:BL-6 (25lb, 50m), BL-7 (25lb, 50m), BL-8 (25lb, 50m)Braided terylene monofilament, anti-tangle, rot proof, fluorescent, hollow for easy fitting, fluorescent.Packing: 50m in a spoolOther packings are available such as 100meter, 200meter, 1,000 meter or per customer request.       Flexible   3-5 days after payment confirmed   We can support customer desgin MOQ is 50pcs.