I got 4 mags for sale. The size is 15 inches. They are 4 bolts. And there is 2 bolts patterns as you can see on the photos. One is about 2.75 inches or 2 3/4'' And the other one is about 2.5 inches or 2 1/2 inches. They have been used and are a bit scratched but are still good. Like for winter for example. The brand is Touren