Its a wheel used in harvester machine, its comes in grade material and also for karthar big bore is used, and claas machine small bore its used. The weight also differs for each wheel . More life is giving , we give guaranteed for the life of wheel. a) 19 teeth driving gear wheel claas ( 200 bore)b) 19 teeth driving gear wheel karthar ( 280 bore)c) special chrome steel driving gear wheel claas ( 200 bore)d) special chrome steel driving gear wheel karthar ( 280 bore)e) elevator gear wheel 10 teeth ( 28 bore 30 bore 32 boref) elevator gear wheel 7 teeth ( 28 bore 30 bore 32 bore)