Qty 2
Laser Cut Acrylic Plastic.  
Designed to improve storage conditions and life of stored engines.
Keeps foreign material, bugs, animals from entering.
Allows for storage oil to last longer.

This fits VM34 MM Mikuni Carburetor Mounts. 
Made slightly oversize to fit in the mount and snap in tightly.
Install by sliding in at a slight angle and then finish installing

Should fit all mounts similar to those pictured.
39mm in diameter.