Denicotea 4mm Pipe Filters, 1 Box of 60

Works well

Various Internet posts state the Porsche Design German made Smooth Billard, the classic one with the aluminum bowl, uses a 9mm filter. Well, mine is rather old and it doesn't. This 4mm filter (nominal sizing, not literal) fits exactly and reliably keeps the draw from being too wet. Who knows, there might even be a small health benefit too.

My stems are all 4.1mm insided dia. on my production items and the size of the 4mm filters are actually 4.3 mm. They don't fit at all and the size is not advertised correctly. My production on 100 stems are all for naught! Impossible to ream out a 5mm outside dia. to 4.4 mm. This has cost me over $1,000.00 on this manufacturer's product that wasn't what it was. 3 mm filters won't do as being too small won't help as the insides would have too be a different size and the whole production wou.d have to be re-engineered.

I see no difference with or without these