Description 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 life. Suitable for kitchen sink, basement, balcony, etc. Features - Color: Blue-Material:Silicone- Size: 6.00X6.00X6.00cm/2.36X2.36X2.36in -Made of premium silicone material and good workmanship, this floor drain backflow preventer is durable for long time using.-The automatic 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, mosquitoes, water back and other problems, bring 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 more convenience.Packing list: 2 x Sewer Drain Cores