Top quality from the SIP premium range, manufactured in Italy. OEM No's 227205, 181476 or 179803. 
 
The rubber frame air bellows connect the air filter box with the frame. The air is taken in through the frame so bigger pieces of dirt can't reach the air filter box. The rubber hose can start to split and gets porous and fragile over time and needs to be replaced. 
 
Fits Vespa P125X, P200E, PX125/150, PX200, T5, Super, Rally Etc.