James, cylinder base gaskets FR/RR. .031" paper

36-47 61"/74" Knucklehead; 37-48 74/80" Flathead; 30-36 VL models; 21-29 J models (NU)

Front & rear. .031" thick fiber reinforced paper. Final crush .025". OEM replacement reference 16774-21 (old 46-21).