MECHANICAL RUBBER GOODS, AS FOLLOWS, HOSE OF ALL KINDS, BELTING OF ALL KINDS, PACKING OF ALL KINDS, TUBING OF ALL KINDS, SPRINGS OF ALL KINDS, AND SPRING-RUBBER, VALVES AND VALVE-BALLS, GASKETS, DIAPHRAGMS, RINGS, PULLEY-SHEAVE FILLING, PLAY-PIPES AS USED FOR FIRE-DEPARTMENT SERVICE, DREDGING-SLEEVES, AND VEHICLE-TIRES