This Stens 5/8 in. x 40 in. OEM Replacement Engine to Variable Speed Belt provides the performance needed to keep outdoor power equipment operating efficiently and dependably. The engine to variable speed belt is made tough to withstand the harsh rigors of yard and garden work, and handle frequent stops and starts common to outdoor power equipment. Stens replacement engine to variable speed belts resist cutting, breaking and stretching that can prematurely end the service life of lesser quality belts. Premium-quality materials are less likely to experience damage from outdoor working conditions and less likely to loosen from stretching. The engine to variable speed belt maintains its strength, shape and flexibility throughout the hottest days of summer and the coldest days of winter. Contaminants like dust, sand and soil will not compromise the performance or service life of this engine to variable speed belt. Stens replacement belts offer an exceptional value that pays off with a higher performance and a longer service life.