Our coffee bag valve is European style,the diameter is 20mm,
Is it fit for your coffee bag?
Will your coffee bag for coffee bean or coffee powder?
Different type with different price.
If your coffee bag use for coffee bean,you`d better use the Model V1.
If your coffee bag use for the coffee powder,you`d better use the V1 with filter.
The filter can separate the powder and the air-vent,it can prevent the powder
blocking the air-vent,and it does not damage the exhaust effect.
So the price of the V1 with filter is higher than V1.
We also have another type,it is Model V2,the price of V2 is the cheappest,but the diameter is 17mm,it is smaller than V1.This structure is more simple,so the exhaust effect is not better than V1.