This ferrule fits ski pole shafts that are 10mm in diameter. length: 8.5cm from tip to plastic top - check the length of your ferrules when replacing - the rdhh920 and rdhh919 are different lengths, which will affect pole length. The tips on the rdhh919 are slightly shorter than the rdhh920 ferrule.

Loosen old ferrules in boiling water. Apply ferrule with small amount of hot glue.