Proform Calibration Spring Light 10-190 lbs | BB1903

Proform BB1902 calibration spring. Features medium spring, 50-450 lbs range, steel construction, natural finish, ensures accurate valve spring tester calibration, sold as each.

Proform BB1901 calibration spring kit. Features heavy/medium/light springs, steel construction, natural finish, ensures accurate valve spring tester calibration, sold as a kit.

Proform 66774 valve spring tester. Features analog design, 300 lb range, ensures accurate spring pressure measurement, sold as each.

Proform 67597 valve spring tester. Features analog design, 600 lb range, stud mounted, ensures accurate spring pressure measurement, sold as each.

Proform BB1000 valve spring tester. Features analog design, 1000 lb range, 5 lb scale, ensures accurate spring pressure measurement, sold as each.