They appear to be a lightly damped and sprung version for what Kevin said the seller stated was a V-Rod HD which has a very different code.
Which are:
for Honda VF500C V30 Magna 1984-1985
for Kawasaki EN450A 454 LTD 1985-1990
for Kawasaki H2 Mach IV 1972-1975
for Kawasaki KH400 1976-1978
for Kawasaki KZ250 1980-1982
for Kawasaki KZ440A LTD 1980-1983
for Kawasaki KZ440B/G 1980-1982
for Kawasaki KZ440D LTD Belt 1980-1981
for Kawasaki KZ550C LTD 1980-1981
for Kawasaki KZ650H CSR 1982-1983
for Kawasaki ZL600 Eliminator 1986-1987
for Suzuki GN250 1988
for Suzuki GN250 1985
for Suzuki GN250 1982-1983
for Suzuki GN400 1980-1982
for Suzuki GS650GL 1981-1983
Found them using Kawasaki 454 LTD 1990
412-4210C Code applies with Standard duty springs for under 230lb rider or less than 50% bike load capacity used most times
412 Series Shocks | Progressive Suspension
MSRP: $299.95
412-4210C
412 (CHR) CRZR 13.0"