A-Series (A29–A92) transmission belts, some specifically for use on Coltri brand compressors. Choose from the selection of belts listed on this page. In some Coltri literature, the SKU is preceded by "CING." Example: Nuvair SKU [A31.5] = Coltri belt code [CINGA31.5]. For transmission belts not listed here, please contact the Nuvair sales staff for assistance.