Adjustable arm for timber, iron, steel and PVC top-hung casements with 4 opening angles, non-handed, suitable for clearances between 6 and 10 mm, in stainless steel 430, 2 pivots in Saviolyte, 2 brass shims, 4 self-tapping countersunk hd. screws 4.8×13. Range of application: minimum height A = 500 mm, minimum dimension B = 230 mm, maximum weight capacity for 2 arms stays 50 Kg. NB: for windows narrower than 500 mm, one arm can be used.