Ultra drive series Specification : +20%/1500 RPM Color : Orange Material : Japan-made highest grade SWOSC with JIS G 3561 standard (usually used for high temperature valve spring)
Ultra drive series Specification : +30%/2000 RPM Color : Gold Material : Japan-made highest grade SWOSC with JIS G 3561 standard (usually used for high temperature valve spring)
Ultra drive series Specification : +10%/1000 RPM Color : White Material : Japan-made highest grade SWOSC with JIS G 3561 standard (usually used for high temperature valve spring)
Ultra drive series Specification : +10%/1000 RPM Color : White Material : Japan-made highest grade SWOSC with JIS G 3561 standard (usually used for high temperature valve spring)
Ultra drive series Specification : +20%/1500 RPM Color : Orange Material : Japan-made highest grade SWOSC with JIS G 3561 standard (usually used for high temperature valve spring)