For tall and heavy-weight adults, the Progress II Elbow Crutch adjusts from 22 to 29 cm. This crutch is suitable for adults whose size is comprised between 1.60 and 2.15 m. Tested up to 150 kg. - Progress is the strongest elbow crutch in the world • Certified and tested up to 150kg. • Adjustable in height 10 times per clip. • Integrated anti-noise cap. • 4 cuff adjustments.