API 6A Studded Crosses, Studded Tees, Flanged Crosses and TeesStudded crosses and tees, flanged crosses and tees in accordance with API Spec. 6A are available. They are forged or casted from high performance alloy steel, robust, and high cost performance.Studded crosses and tees, flanged crosses and tees are widely used for choke manifolds, kill manifolds, mud manifolds and Christmas trees.