The Blackbird Phantom Floats are made in Canada by Redwing Tackle and are very popular for trout, steelhead, and salmon fishing. The models with the clear bottoms make them nearly invisible from below in the water. The Blackbird Phantom Floats also work well when fishing for crappie or panfish in clearer/shallower water. The models with the black bottoms add a little more contrast making them easier to see when fishing deeper/darker waters. These floats can easily be used for slip float style fishing, are constructed using 1 solid piece of plastic, and are very durable. The Blackbird Phantom Floats come two to a package, have a slit in the bottom section to put the line through, and come with silicon tubing to hold the line in place on the top and bottom of the float.