NDS 910B 4" Round Solid Grate with PVC Collar, Satin Brass 3 Pipe 4 in. Drain Fittings, 4 Strong and stylish, the brass 4 in. Round Drain Grate resists rust and corrosion with a lustrous look. The round drain grate, also known as a drain cover, is ideal for draining light flows of stormwater from small lawns, landscaped areas, patios, and walkways. Grate is made of solid brass and the collar is made of polyvinyl chloride, a type of plastic.The 4 in. Round Drain Grate has an open surface area of 5.3 sq. in. and flow rate of 16 GPM. Connects to 3 in. sewer and drain pipe and 4 in. sewer and drain fittings for a soil-tight fit. The pipe grate is ADA Compliant and heel-proof. The brass drain grate is built to stand up to the elements, and the PVC collar is made with a combination of virgin and recycled content treated with UV inhibitors to prevent fading and cracking from the sun. As part of a complete drainage system, the grate blocks leaves and debris as water enters drain pipes. The pipes carry the water to a discharge point downstream such as a pop-up emitter, or to percolate into the ground with a dry well or infiltration trench.NDS offers free tools such as the Home Drainage Center, Calculators, and NDS Stormwater Drainage mobile app to help make your project a success. Founded in 1972, NDS is the preferred choice of professionals and the leader in stormwater management solutions. Features Protect your drainage system by using a grate on top of drain pipe to block debris from entering and potentially clogging the pipeline while letting excess surface water flow through. Ideal for draining light water flows from small lawns, landscaped areas, patios, and walkways Fits 3 in. Sewer and Drain Pipe, 4 in. Sewer and Drain Fittings. 16 GPM flow rate. 5.3 sq. in. open surface area. Rated for NDS Class A loads (up to 60 psi) when properly installed?recommended for pedestrians, bicycles, and wheelchair traffic; ADA compliant and heel-proof Place on top of drain pipe or drain fitting for a soil-tight fit. 4 in. Round Drain Grates with Collars are available in a variety of materials Grate is 1-3/4 in. high; 4-1/4 in. wide in diameter; grate openings are OE in. wide USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.