Tube Brush

Single Helix/Single Rod (2 Wire)

The brush fill is wrapped between two rod wires, one on each side.

Single helix/double stem (4 lines)

The brush fill is wrapped between four stem lines, two on each side.

Double helix/double rod (4 wires)

The brush fill is wrapped between four rod wires and has two layers of fill. Each level is perpendicular to each other, with a main line in each quadrant.