Kudale instruments manufactures model sak-1 piston diameter tester apart from a wide range of other instruments. This piston diameter tester is useful for checking piston diameter by comparison method. The company supplies these piston diameter testers in a wide range of models such as sak-1 with 160 mm piston height and 40-70 mm piston diameter; sak-2 with 160 mm piston height and 70 -100 mm piston diameter; and sak-3 with 160 mm piston height and 100-150 mm piston diameter.