Sinking tip lines are often your best choice for reaching feeding fish in moving water. We've applied our fly line expertise to create the most effective sinking tip lines available.

Scientific Anglers™ sinking tip lines reach fish feeding deeper than a foot or two below the surface - beyond the reach of floating lines.

Scientific Anglers™ sinking tip lines also provide the visibility of a floating line for easier strike detection, unlike full sinking lines where your ability to detect strikes is limited to the sensitivity of your rod and tautness of line.

The first 8 to 14 feet of line features our advanced high-density sinking design. You can choose from four sink rates to drop your line into just about any strike zone you discover.

The remainder of each Ultra 4 sinking tip line is formulated with AST for the ultimate in shooting and casting performance, as well as outstanding durability. Both Ultra 4 and Air Cel™ Supreme™ 2 sinking tip lines also feature 3M Microballoon technology to ensure excellent floatation. You'll also be able to mend the line for more control, and take advantage of quicker pickups and recasts.

Sink depths are primarily affected by current and are somewhat limited by the planing effect of fast-moving water against the line. Determining the best sinking tip line for any given application should be based on current speed, water depth, and retrieve rate.

Type II — 1' - 4' depths in moderate currents; shallower in fast currents.
Type III — 3' - 5' in moderate currents; shallower in fast; deeper in slow.
Type IV — 5' - 8' in moderate currents; shallower in fast; deeper in slow.
Type V — 8'+ in moderate currents. Ideal for deep fish and fast currents.