Teknic offers Flexible Control Stations. Teknic is an ISO 9001: 2000 certified company. The Flexible Control Stations can accommodate up to three different control and indicating devices. The stuffing box glands in M20 x 1.5 and M25 x 1.5 are made of either plastic or metal and are available for the electrical connection. The plastic glands require no lock nuts. Metal glands are screwed into a metal earth plate sheet inside of the enclosure.