The Silvertip 10 Sink Tip Weight Forward Fly Line is a great option in moving water where getting flies down under the surface while maintaining control can present a challenge. Featuring a  10 sinking tip with a 1.5 ips sink rate, this is great choice for streamer fishing from a boat, while wading or just about anywhere. A braided multifilament core for cold to moderate water temps. Line weights 4-12. 90 long.isp = inches per second