Excise exemption for captive use in pump manufacture: specified inputs attract Nil duty when used within the factory. An exemption inserts a new table entry providing a Nil excise rate for goods of Chapters 72, 73, 82, 83, 84 and 85 (except electrical stampings and laminations, bearings and winding wires) when such goods are used within the factory of production in the manufacture of the goods specified in the principal notification (pumps).