Material: copper Size:as the picture Easy to install, plug and play. Features:Anti odor/ Anti defection/ Fast drainage/Insect Prevention Automatic opening when draining, final 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 bottom of the ABS gasket, dripping unimpeded. (2) After disruption of water, gasket is robotically closed due to gravity sealed in order that the gasoline within the pipeline, pests and over movement can not be up. Package Included: 1Pcs/set * surface drain core