QS-1/2-16 QS-1/2-16-20 QS-1/2-3/8-I-U-M QS-1/4-10 QS-1/4-10-50 QS-1/4-10-I QS-1/4-10-I-50 QS-1/4-12 QS-1/4-12-20 QS-1/4-12-I