Flex Scrims are made from a slightly heavier spring steel & are made in both Open End & Solid Frames. The Matthews Flex Scrims have pins for easy mounting into either a Superflex Arm, a Flex Arm or a Grip Head. C olor coded on one of the pins for easy indentification of the fabric sewn on. Flex Scrims are available in 10"x 12" or 12"x 20" & a variety of fabrics. Matthews Flex Frames are black powder coated to minimize unwanted reflections.