The Sloan 4.5 Gpf Black Water Closet Diaphragm Assembly is a high-quality valve designed specifically for use with Regal Flushometers. This assembly, model 3301036, is designed for bathroom applications and features free express shipping within the United States. The sleek black color adds a stylish touch to your bathroom while ensuring efficient and reliable water usage with its 4.5 Gpf size. Perfect for maintaining or upgrading your toilet system, this Sloan diaphragm assembly is a durable and practical choice for any home.