400J7 Industrial Grade Bando Poly-V rib belt. 7 Ribs. 40” (1016mm) O.C. - PJ1016 Metric belt. BANDO USA “J” Series Poly-V (Micro V) ribbed belts are designed to replace OEM belts on extra heavy-duty applications such as 400J7 sander/planer belts, compressor belts, 400J7 (7-Rib PJ1016) fitness drive belts, and electric motor drive belts. AKA: J7-400 Belt.