orthoplasty silicone duo 30 a b shore a 30 32 250 g frescoDuo Shore A and B rigid orthoplasty silicone FRESCO Very easy to use: to make the orthosis, simply mix the same quantity of the two components (A and B). The mixture needs about 5 minutes to harden 24 hours after the orthosis is finished. This gives a Shore A hardness of 30 32 with excellent mechanical behavior and which is not irritating. Color: Yellow + White