Couple of stay arms for top hung window, length of 20″ (508 mm), in austenitic (not magnetic) AISI 304 stainless steel, non-handed, with opening restrictor device and adjustment frictioning grub screw, opening angle 20° or 25°. Weight capacity 115/108 Kg (253,53/238,09 lbs). Suitable to profiles with clearance >= 16.5 mm.