Micron engineering corporation manufactures tgpl series tube clamp coupler to tackle the problems caused by variations in outer diameter of copper tube. Sealing the tube on face of seals solves the problem. The tube is inserted after pushing down thumb lever and black handle is moved to 90 to push the rubber seal to hold od of the tube from inside the coupling, the tube is then sealed on the face of the seals. The tgpl series tube clamp couplers therefore provide advantages like high vacuum application; simple operation; user friendly to thumb lever and easy to maintain. The company provides different sealing materials. Some of the technical specifications include brass and stainless steel construction material; ΒΌ, 3/8 sizes; 30 kg/cm2 working pressure; and 40-kg/cm2 pressure resistance. These tube clamp couplers are suitable fluid-freon, helium, vacuum, air, hot air, etc. The company provides seals in hnbr, viton, and neoprene.