The 4-Way Cross model no .EV01060 is available in the KF size 50 having dimensions 70,50.8,75,140 respectively.The 4-Way Cross are manufactured in 304 stainless steel material. The product assemblies contains two flanges, a centering ring, and an aluminum clamp. A constant supply of pressure on the clamp produces a vacuum seal. The mating flange surfaces compress the O-Ring, which is fixed in place by a metal centering ring, to develop a vacuum seal.