The Tommee Tippee Sangenic refill cassette fits all tubs*. The cassette has an advanced multi-layer, anti-bacterial film, which locks away germs and odours. The film keeps on killing germs even while the nappy is disposed of in the tub, for maximum hygiene protection. The cassette gives unbeatable odour protection. Twist-lock technology individually seals each nappy, locking away germs and odour. The system is scientifically proven to be 100 times more effective at odour prevention than nappy sacks. Just drop the cassette into the top of the tub and it's ready for use in seconds.· 1 x Compatible Cassette· New cassette fits all tubs* · Unbeatable protection from germs and odours· Antibacterial protection - kills 99% of germs on contact· Twists & LocksTM away germs and odours· 100 x more effective at odour prevention than nappy sacks· Uses 60% less plastic than premium nappy sacksEach cassette lasts about 1 month (based on average usage of sized 3 nappies).*This refill cassette is compatible with all Tommee Tippee Sangenic nappy disposal systems. If you already have a Tommee Tippee Sangenic nappy disposal tub, then this cassette will fit your system. Fits Nappy Wrapper (yellow); Nappy Wrapper (white and lilac); Nursery Essentials (white); Hygiene Plus (white with plunger); Nappy Wrapper Maxi (white and lilac).If you already buy one of these cassettes, then this new cassette replaces them all. It's the one you need to buy.You cannot get a better recommendation than from another Mum and in an Independent Survey, 99% of mums who have been using the Sangenic nappy disposal system, would recommend it to a friend.Clever BitAdvanced Germ sealTM anti-bacterial film keeps on killing germs inside the tub.