PFister 951-988C Replacement Plastic Washer. Pfister takes pride in every single piece, part, and product they develop. Helping them maintain a their reputation and credibility. They take that same pride in creating replacement parts to perform the way they were originally intended too. Rather its for their faucets, showers, or bidets, you can rely on its quality to perform and last. The Pfister 951-988C Is a Genuine Replacement Faucets Washer for Pfister-Amherst Series 34 Single Control Kitchen Faucets. This individual Replacement Part comes in a fine Grey finish.