foam filter for wet dry vacuum cleaners are designed specifically for wet pick up. Replacement foam sleeve is a foam filter for wet dry vacuum cleaners that can be removed and cleaned with water. Designed to fit: for NT Series Accessories MV1/WD1 /WD2 WD3. Color: Black Material: Sponge Package Contents: 12 x Foam Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.