Mild Steel housings TIG welded construction with internal bulkheads, folded gussets, and 3 1/4" DOM axle tubes. We weld these housings inside and out for maximum strength and durability. Housings come with a billet fill cap and studs installed, vent and drain included too. Customer's regularly use 9.5" ring gears in our product, and have used 10" gears as well! We can supply all the parts to finish your projects, from brackets to brakes, you can count on us to help you complete your project like a pro. We are dealers for SCS GearBox, Strange Engineeering, Moser Engineering, Mark Williams, Wilwood, TBM Brakes, and many more high quality companies ready to serve your needs.