The floor drain backflow preventer is very convenient to have odor proof effect for your bathroom, kitchen sink. Made of premium silicone materials, durable for long service . Suitable for kitchen sink, basement, balcony, etc. Features -Color:Blue -Material:Silicone -Size:10.00X6.00X6.00cm/3.93X2.36X2.36in -Made of premium silicone material and good workmanship, this floor drain backflow preventer is durable for long time using. - closing design is adopted to prevent the sewage vapor from producing peculiar smell, block the backflow of the sewer, drain the water easily. -The curved folds form multiple barriers to odor, , water back and other problems, you satisfying using feeling. -Compatible with most toilets, bathrooms, kitchens, basements and washing machine drains, practical hose backflow preventer satisfy your demands. -Light weight, compact size, easy to use and install, silicone shower drain core brings you much . Package list: 2 x Sewer Drain Cores