PU synchronous belt with the various demands of the transmission power is not limited to all the standard size of general table, for example, about a new requirements for long stroke, designers have considered using pneumatic device and gear and rack mechanism, but can't be used, a compressed air and steel rack is too heavy, the cost is high. Zui final design is long tooth profile tape instead of rack and substitute sprocket gear. Priority in this plan now, because the program installation is rapid, and cost is lower than the original plan. Long distance or termination structure and standard of synchronous belt with no joint ring synchronous belt is the same, by neoprene belt body, glass fiber reinforced lines of tooth surface and nylon fiber. 5 m. Long tooth profile of the tooth profile tape available standard trapezoidal tooth, tooth pitch for L or H class, big torque transmission gear pitch to 8 mm. Long synchronous belt can be used to replace the rack and pinion drive, also can be used as a conveyor belt, especially suitable for the need to synchronize production situation of transmission parts.