Kohler* Wellworth*K-3987-0*
with K-4458 Dual Flush Tank Parts

The K-4220 Tank is used on the following Wellworth 1.0 to 1.6gpf Dual Flush Models:
K-3987-0, K-3988-0, K-3987-RA-0, K-3987-RA-0, & K-3988-RA-0