Grace Mackerel In Hot Tomato Sauce. Quality since 1922. Classic. Hot & spicy. Omega 3 nutrients. 500mg Omega-3. Fatty acids. Per serving. Net wt. 155 g (5.5 oz.). Grace classic mackerel is a traditional favorite with a delicious rich hot tomato sauce enjoyed by generations. Omega-3’s are polyunsaturated fatty acids that support the optimal functioning of the body.