Set of 2 - hot and cold are identical
Replace if the face of the seat is chipped, cracked, scratched, pitted, etc.
31230 x 1230 k1230 1084 seat ring
The hot water drip and dripped…ordered the parts…got them within 3 days..when I took the unit apart..the supply seat was pitted and was the cause of the leak…new parts were perfect and the job took under 60 minutes to complete…our unit is 8 years old..the Florida swamp water destroys everything….
Hot side still leaks unless turned off with extra push.
Please see these instructions: https://dishmasterfaucet.com/pages/ts7-adjust-handles
and watch this video: https://www.youtube.com/watch?v=sz8l5eREsBg&t=6s
Call toll-free 800-521-9234 if you need further assistance.