Gold-Up has over 20 years of experience in SMT aluminum frame manufacturing. Our SMT frames are constructed with 6063T5 alloy, it complies with ROHS environmental standards. The frames have uniform wall thickness for strength against bending when pre-stretched. The four corners are TIG welded and sanded for a nice smooth watertight finish. The mesh side is roughened to create excellent mesh/glue/frame adhesion. The frames are completely flat and strong, so they are extremely durable and long-lasting.