Velo Solex Fuel Petrol Gas Pump Seat for ball

To inserted into the following with plastic ball seats: 

– SoleX 1700 
– SoleX 2200 
– SoleX 3300 
– SoleX 3800 
– SoleX 4600 
– SoleX 5000 
– SoleX PliSoleX 
– SoleX Flash 
– SoleX 6000 
– SoleX Micron 
– TrotileX 
– Westhoek