Cartridge Filter 8" x 7" Wide 2"mpt 32sqft Master Spa Down East Coleman Maax 2" Male Pipe Thread Bottom measures about 2 1/4" across We are offering a Cartridge Filter 8" x 7" Wide 2"mpt 32sqft Master Spa Down East Coleman Maax. This filter is 8" long x 7 " Wide and has a 2" Male Pipe Threaded bottom which measures about 2 1/4" across the threads.. We offer related parts for this filter as well as other items in our store. x268310,X102900,X268056,X268330, PMA EP1,X268055,X268057,X268320 We have done a lot of extra work with videos and pictures to prevent you from choosing the wrong part..