I see this ad from a seller in Switzerland on GunBroker all the time. Have heard of the "blue seal" but not familiar with red ones. These are not the infamous "pink" seals or their kin, are they?

Are red and look very similar to those. Without the dimentions its hard to say.

copies of the apex JM seals

not the REAL thing

warren

and remember "it's 30% the gun and 70% the shooter"

of jm seals varies with his available materials. my last ones from him (apex) were blue. the next one may be red.

and they worked good. I could not really tell any negative results between these and the blue. At $6.00, I would buy again. Buy several at once to make up for the overseas shipping. Fast shipping though. I had to wrestle pretty good to get one on a Model 350. I have many shots through it though and I have no complaints.

Couldn't JM be buying these and selling them domestically?

and selling them overseas through his swedish connection. (just kidding).

They are from Kueng Airguns "http://www.blueline-studios.com/kuengairguns.com/showroom.html"

Info from the site:
Get maximum velocity using our red high performance parachute design piston seal! Top quality polymers and rigorous quality standards ensure highest durability. Unbeatable.
28.6mm diameter; to fit models RWS Dianawerk 24, 26, 28, 300, 34, 36, 38, 40, 45, 46, 48, 52, 54, 60, 66, 75, 350, as well as SM1000, B21-2.
sale price $6,- /piece if you buy over 6 pieces the sale price is $4,70 /piece + shipping in envelope from Switzerland.

According to Dan Kueng there is no difference between his and JM seals. Both are more heat resistant than the OEM seals

A picture for comparison between OEM(used)/Kueng/Maccari

Dimensions in mm from top: seal outside diameter - seal thickness at the edge - seal thickness at the middle

I experienced a fast response on questions and fast delivery from Kueng Airguns. Also theirs customized Dianas ( unfortunately not for sale ) look extremely great.

Have been using these seals for sometime now on 54, and keep replacing them every 3000 shots or so. Work Great.