This is a medium metal metal fitting that converts a plug type (Tachino type) to a different caliber insertion type (Tachino type). Can be used in a wide range of fields such as agriculture, marine, fire fighting, etc. This product complies with Japanese Industrial Standards (JIS) F7335. Material: Brass; Machino Female Side Caliber; 50 A; Machino Male Side Caliber; 40 A