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Vel Di2 Battery Holder Carbon 31.6
Vel Di2 Battery Holder Carbon 31.6: Securely fit your internal Shimano Di2 battery inside your seatpost Suitable for 31.6mm carbon seatposts

Vel Di2 Battery Holder 31.6
Vel Di2 Battery Holder 31.6: Securely fit your internal Shimano Di2 battery inside your seatpost Suitable for 31.6mm alloy seatposts

Vel Di2 Battery Holder 27.2
Vel Di2 Battery Holder 27.2: Securely fit your internal Shimano Di2 battery inside your seatpost Suitable for 27.2mm alloy seatposts

Vel Di2 Battery Holder Carbon 27.2
Vel Di2 Battery Holder Carbon 27.2: Securely fit your internal Shimano Di2 battery inside your seatpost Suitable for 27.2mm carbon seatposts
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