This flexible rod is designed with a special screw-in thread for use for tube cleaner brushes, part numbers 5354, 5356, 5365, 5368, and 5391. The rod includes one 30 inch extension and can be extended by 30 inch increments by attaching part number 5346. The flexibility is ideal for adjusting to clean curved pipes, such as sight-glasses on large tanks and hoses used for transferring liquids from one tank to another.