Material: copper Size:as the image Easy to install, plug and play. Features:Anti odor/ Anti defection/ Fast drainage/Insect Prevention Automatic opening when draining, last after draining. Applicable: Widely used for Pipes Tubes in Toilet, Bathroom, Kitchen , Floor and more. Working Principle: (1)When the water into the ground drain, the gravity of the water will open the lowest of the ABS gasket, dripping unimpeded. (2) After disruption of water, gasket is robotically closed due to gravity sealed so that the fuel in the pipeline, pests and over stream can not be up. Package Included: 1Pcs/set * surface drain core