Recently bought one for my old shop vacuum but the young man who was hired to clean and sand the wooden floor couldn't use the sander's vacuum which made a terrible mess. The filter used to collect the whole house of 1700 sq.m. foot, worked great. I did not clean the filter clogged with sawdust. Due to the low price and fast delivery, I bought two more, now the shop vacuum cleaner is like new again. I am grateful to this seller and highly recommend his product. Finally a happy ending to the story.