Materical : ABS + Metal Size: S/M/L Applications : for 3~4 holes 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 lowest of the ABS gasket, dripping unimpeded. (2) After disruption of water, ASB gasket is mechanically closed because of gravity sealed so that the gasoline within the pipeline, pests and over circulate cannot be up. Package Included: 5Pcs/set * floor drain core Note: 1 filter conceal could be eliminated once you not needed.(note:filter conceal ship random) 2. Some dimensional mistakes happen due to need for handbook measurements. 3. Due to the adaptation between assorted displays, the picture might not reflect the actual coloration of the item.