Siegfried's Call Artist Series French Horn Mouthpiece Rims
SCASR: Variable depending on the Artist. Our first rim is the Rachel Drehmann rim (17.75mm)
The threads are 3/4 x 36 Giardinelli standard threads, with a junction point of .660". The rims are designed to work well with older Giardinelli, Schilke 2-piece, Moosewood, Osmun, and Houser cups. They may work on other cups made with the same threading too... We just have to try it!