It's made of polished cast aluminum and is 4" tall. The base measures 1-3/4" x 4-3/4". The top of this breather is NOT removeable. Breather includes a lower baffle plate in addition to featuring internal layer type baffle where one plate is over the other. It allows the air to breath, but keeps the oil baffled below.
Includes mounting bolts/nuts, breather baffle plate, and gasket.
Breather Cut-Away View (GIF)