Excellent quality ferrules for your ski pole tips. Use hot glue to install. To remove old ferrules or snow baskets use heat such as heat gun or boiling water to loosen glue. Size is the width of the end of the pole. Make sure you put them on pointing forward to dig straight down into the asphalt.
Compared to Salomon snow baskets, these add 5 mm more in height to your poles.
Compared to the Swix CT1 snow baskets, these add 0 mm more in height to your poles.
Height from inside bottom where pole sits to carbide tip is 34 mm.