Unequal Tee model no. EV01053 is manufactured in the KF size 40/25 having dimensions 65,50,55,40,38.1,25.4 respectively.Unequal tees are composed of 304 stainless steel material. The product assemblies consist of two flanges, a centering ring, and an aluminum clamp. A constant supply of pressure on the clamp generates a vacuum seal. The mating flange surfaces compress the O-Ring, which is fixed in place by a metal centering ring, to produce vacuum seal.