3M(TM) Trizact(TM) Cloth Belt 217EA, 4 in x 132 in A30 JE weight Filmlok, 50 per case An aluminum oxide Trizact(TM) abrasive product belt constructed on a JE weight, flexible rayon cloth backing. Resin bonded for heat resistance. Features grinding aid for cooler grinding. Grade: A30. Primary market: metalworking.