This product is intended to be used in cases where the string needs full extention. Patellar provides post-operative support after arthral and collateral ligament operations. The product is made of 6 mm thick non-terry cloth sponge covered with special velcro fabric. The string provides string 0 extensibility through three adel metal bars, one on the rear axis and one on the sides. 45, 55, 65 and 75 cm long.