Comparison : Item # 12446745028, Female Straight Hose Conn 5 mm x 1/8"
Item # 12446745048, Female Straight Hose Conn 5 mm x 1/4"
Item # 12446745068, Female Straight Hose Conn 5 mm x 3/8"
Item # 12446745088, Female Straight Hose Conn 5 mm x 1/2"
Item # 12446746028, Female Straight Hose Conn 6 mm x 1/8"