Used on large Prestige bowls. Protects the sink bowl from scratches. For use on the following sinks: PRX-120, PCX-120, PRQ-120, PRX-160, PCX-160, PRQ-160, PRG-160, PRX-110-21, PCX-110-21, PRQ-110, PRM-110-21, PRX-620, PCX-620, PRQ-620, PRX-660, PCX-660, PRQ-660, PRG-660, PRX-610, PCX-610, PRQ-610