QST-3/8-10-20 QST-3/8-12 QST-3/8-16 QST-3/8-6 QST-3/8-8 QST-3/8-8-50 QST3-1/4-5/16-1/4-U QST3-1/4-8-6 QST3-1/8-6-4 QST3-10-8