... Fruit hardness Tester), this series includes GY-1 GY-2 and GY-3 three models, used to judge fruits’ maturity by testing hardness of fruit ... such as apple, pear, watermelon, banana and so on. It’s portable, small on volume and light on weight ... by testing hardness of fruit such as apple, pear, watermelon, banana and so on. It’s portable, small on volume and light on weight ...