Plastic case ■ Plastic case ■ Hex case for small pin φ0.05~φ10.00 Hex case for large pin φ10.01~φ20.00 ■ HK case with φ20 or more ■ HK-31 φ20.01~φ25.00 HK-40 φ25.01~φ35.00 HK-60 φ35.01~φ55.00 ■ Test tube case ■ Test tube case-small (~φ10×95L) Test tube case-medium (~φ12×95L) Test tube case-large (~φ12×120L) Test tube case-outsize (~φ14×140L)