Cylinder Silencer.  Keeps D & E Cylinders from rattling around. PKG/10

Cylinder Silencer – Large, For D, E, M9, M7 Cylinders

Fits racks and carts with D, E, M9 or M7 cylinders
Designed to reduce cylinder rattling and bumping during transport
Easy to use, simply push into place
For use with vertical racks only
For use with RRI Warehouse Series racks and carts
Sold as pack 10