It can be divided into solid core products (round, square, flat-shaped sectional shape), hollow metal products and rubber and other types of composite articles. Among them, metal rubber composite seal more than 60%. Section design is essential for the rubber Sealing strips.

       First sealing lip shape, size, design, lip seals on both sides should be the same size on both sides of the appropriate force from the contact glass window glass. Lip length, thickness should be appropriate, too thick, too long to make the glass lift resistance is too large, too thin, too short will cause the glass to get a good guide and sealing, vibration, noise, leaking phenomenon; followed by cross-sectional shape of the bottom, the design size, the window has a convex cross-section steel channel, its role is to assemble the guide groove, and therefore, the bottom section of the guide groove should design the appropriate structure, both easy to mount, also taking advantage of its own elastic Sealing strips attached to the steel guide groove prevent prolapse; and finally take the side of the outer shape, size, in order to improve the appearance of the guide groove, finishes and body should fit closely.