Perfect for the Hoover carpet washer! I was afraid I'd have to throw the whole machine away as I let the tank and lid air dry outside after hosing it down and the lid warped/half-melted in the sun! I didn't even realize it had happened until I tried using the shampoo again and it didn't work properly because there was no proper seal. I'm so glad this item was available - it saved my car and a lot of money.