462″ bore = 11,73 mm Bell Ø 4 7/8” = 124 mm Yellow brass bell Gold brass leadpipe Monel pistons

Modell: 3BF with F-attachment 508″ bore = 12,90 mm Bell Ø 8″ = 203 mm Yellow brass bell Hand-hammered one-piece

Model 4BF with F-attachment 547″ bore = 13,89 mm Bell Ø 8 5/8″ = 219 mm Gold brass bell Hand-hammered

3 valves All yellow brass Bore .687′ = 17,50 mm Bell Ø 26″ = 660 mm KING 2 mouthpiece Hard-shell

3 front action valves Lightweight white fiberglass body, yellow brass valve section Bore .687′ = 17,50 mm Bell Ø 26″