thank you so much for the replies. i just wish they weren't yellow in color. appears that the yellow one's are the only one's that fit round two stage filters. also, i'd prefer to buy them from from somewhere other than ebay. nonetheless, i guess i'll see what's up them.

ofnajoe... i believe you ask'd if i wash them. yes, i wash the filter covers and re-use them. i also take the draw-string out of them and use rubberbands to secure them instead.