Tri-Bearing design for precision handling and superior durability. Extra durable billet aluminum end caps and top covers. All cases are zinc plated. All boxes have 13/16Pit Stop USA offers AGR Racing Steering Box - 12:1 Ratio - .280" Valve 2012B280 at low everyday prices. Be sure to check out all of our products from AGR Performance Steering including AGR Performance Steering Steering Boxes.