Mackerel in Jack Brine, 3-6 pieces per 425g/235g,24 jacks/ctn Mackerel in Tomato Sauce, 3-6 pieces per 425g/235g,24 tins/ctn 1. Mackerel in Jack Brine,3-6 pieces per 425g/235g,24 jacks/ctn2. Mackerel in Tomato Sauce,3-6 pieces per 425g/235g,24 tins/ctn Best Canned Mackerel in Jack Brine and Best Canned Mackerel in Tomato Sauce