This replacement filter cartridge has the technical specifications as Unicel # C-4601, Pleatco # PL18P-4, Filbur # FC3745 and OEM # C4601. This filter cartridge is capable of handling the top load of 16 square foot and is the best fit for Lomart 60-4316. It is very easy to install filter cartridge and is made of high quality of materials. This 18 inch long and 4 ¾ inch wide filter cartridge has 1 ¼ inch open hole at its top while 2 7/16 inch hole its bottom. This high grade filter cartridge gives you clean and water free from sand and germs.