Brass; 4.975 in. Od flange; 0.372 in. Flange lg; 4.600 in. Od body; 0.375 in. Body lg; accommodates two 3.188 in. Lg reeds and three 3.812 in. Lg reeds; two thd mtg studs 180 degrees apart 4.125 in. C to c; 0.250-20 unc-2a rh thd size; 0.875 in. Lg; furnished w/two hex nuts