Cleansui Faucet Installation Parts Adapter For MD301, MD311, MD111, MD101 *Only B set was used, so this is for those with A and C faucet types. *Please confirm that it fits your installation before purchasing. ◆A Set (For round pipes with a bulge at the end) 16mm, White ◆C Set (For aerator faucets, internal thread) For TOTO, GROHE faucets, Gray, M24