3 Pronged Ferrule for 19mm walking sticks. Footprint approx 11cm 3 pronged rubber for the bottom of walking sticks / canes . Sc-med10350hctr 19mm cane shaft size.. tri cane rubber for walking canes, tri cane rubber ferrule for a walking stick for sale, 3 pronged rubber for a walking stick, tri cane walking stick rubber for sale