Armchair raiser (Welling DA16)

Pair of strong metal bars of adjustable length to raise height of armchair or similar furniture by 9 cm, if distance between legs is more than 38 and less than 68 cm. Circular cups safely hold foot of leg, providing diameter of foot is less than 6 cm. Short bolts (not supplied) would enable height to be raised by further 2 or 4cm.