SIZES AVAILABLE IN 4 INCH , 4.50 INCH, 4.75 INCH , 5 INCH 4 INCH SIZE FOR KIDS/CHILDREN COLOR BLACK MADE OF HIGH QUALITY STAINLESS STEEL. PROVIDES OPTIMUM COMFORT FOR THE LEG POSITION. PROVIDES OPTIMUM COMFORT FOR THE LEG POSITION. SAFE, SECURE, DURABLE AND NON-RUSTY. RUBBER TREADS. IT KEEPS THE FOOT AND LOWER LEG STABLE. SIZES AVAILABLE IN 4 INCH , 4.50 INCH, 4.75 INCH , 5 INCH HIGH QUALITY STAINLESS STEEL. GOOD QUALITY FLEXI LINKS MADE OF STEEL NOT IRON SO MORE DURABLE