The patented P.E.I. design is often referred to as SURE-SPRING, representing the most advanced level of technical innovation when it comes to roll-up covers. The spring mechanism design considers all the intrinsic defects in other rollers on the market, overcoming most of them with a radically new design of the spring mechanism.
The manufacturer did not stop there and added a mechanical system that can fasten the band to the tube. Note that no adhesives are required for this roll-up cover, and there are many more advantages. For example, the acceleration up to 2g and the advancement speeds up to 150m/min are just some. Finally, the manufacturer guarantees 2,000,000 movements.