Have 6pcs of Sponge filters for sales. Sponge are all new. Dimension of Sponge - (circumference 4.5inch, height 4inch)The base and tube are used. Clearing at $5 each.Take all 6pcs, will throw in all the extra holders and spares (picture 4). All for $28. Collection at Blk 674B, Yishun Ave 4.