The "U-Bow" is Marker's name for the "U" spring / pins used in the Marker Alpinist ski touring bindings heel units.
Available in three different stiffnesses, Soft, Medium and Hard.
The Hard spring corresponds to DIN 11 and is mounted as standard in the Alpinist 12 bindings.
The Medium spring corresponds to DIN 8 and is mounted as standard in the Alpinist 9 bindings.
The Soft spring is designed for lighter skiers, less than 60 kg.

- Sold in Pair