Product Description Fly fishers the world over agree that the STH cassette system is hands down the most practical and economical way to carry a variety of fly lines. the virtually indestructible light weight polycarbonate spools are available in four sizes for line weights 2 - 10. These spare cassettes fit any of the STH Cassette line of fly reels including the MR POP Cassette reel carried in our store. The Pop Cassette system makes it simple to change lines as conditions change.
