Birchmeier 10914601 Piston Tube, Brass
IMPORTANT NOTE: This part fits only the old style Birchmeier Backpacks. It does NOT fit the AT-style backpacks.
When the Birchmeier piston tube becomes scratched or worn, the backpack cannot develop pressure. Be sure to keep your Birchmeier backpack well-lubricated with authentic BIrchmeier Grease, sold separately.