With this high-quality sanding belt, you can trim and sand very uneven surfaces on your boat. The 1 1/2X132 120# BELT (10/Pack) (312120-1.5-PK) is excellent for polishing bronze and stainless steel propellers. It is created using cutting-edge abrasive technology. The J-weight backing helps to prevent gouging and chatter. It also has an additional grinding-inducing layer on the sanding belt that reduces the grinding temperature. To safeguard and extend the life of the belt and the material used. Key Features: Can trim and sand very uneven surfaces Excellent for polishing bronze and stainless steel propellers Created using cutting-edge abrasive technology It has J-weight backing that helps to prevent gouging and chatter It has an additional grinding-inducing layer on the sanding belt that reduces the grinding temperature Can replace 312120-1.5, 312120F01413204 Specifications: Brand: Klingspor Abrasives SKU: 312120-1.5-PK UPC: 312120F01413204 Weight: 0.44 LBS Quantity per Packaging: 10 Size: 11/2 inches x 132 inches Grade or Grit: 120 Klingspor s Superflex belts are excellent for preparing bronze and stainless steel props for polishing. Their hi-performance grit keeps them cutting longer than most abrasive minerals. Extremely flexible J-weight backing helps to avoid chatter and gouging.