Don't deal with this seller.
a) inlet hose connector was faulty flooding all the all over the cabinet.
b) the filter chambers only had one O ring (poor design,) my replacement unit had two O rings, and some other units on eBay have three O rings. That's why the seller did not provide any photos of the inner chamber. having more O rings will reduce the chance of flooding.
c) missing attachment screws.
Note have contacted the seller but only responded about the O ring which is only a design thing