The "air horn" screens shown on the Pierce Manifolds site look very much like the ones I bought from Inglese. I ordered the 80mm set to fit over my 79mm DC&O trumpets, but they were a very tight fit. 30 mins of driving saw 3 of the rubber rings split open - not happy !
Either they sent me the smaller size by mistake, or the rubber rings were very poor quality.
Also, the filter film between the mesh layers was a bit suspect - I didn't have things tuned up all that well when I tried these things & it would spit & cough a bit. After the 20 mins of driving (& about 20 coughs/spits), there was nothing left of the filter foam in 4 of the units !
All in all, not very impressed with the Inglese version. It would be interesting to know if the Pierce ones are different (& therefore probably better) !
Kind Regards,
Peter D.