Micalex body, molded in tinned saddle, fine contact integrity. Mounts above or below the chassis the chassis through a slightly larger than 1.177". Mounts to chassis with two machine screws. Mounting centers approx. 1.50". For 6L6GC, 5U4GB, KT88, EL34, 6V6GT, 5Y3GT, 6SN7GTB and similar tubes. Set of six.