POLISTAR flexible abrasive stars are designed for work on hard-to-reach inner surfaces of small-diameter bores and pipes in ¼–1 ½ in. dia range, and POLISTAR-TUBE multi-stage tubing system, manufactured using only stainless steel rivets, prevents corrosion on stainless steel pipes. Available in range of diameters and grit sizes, products can be stacked in several layers and aligned at offset from one another for optimal effect. Multi-stage internal fin-grinding system optimizes efficacy.