These parts have never been used or been outside. They are brand new! You are purchasing 1 brown plastic base that goes under the vertical pole for a 20', 22', 24', or 26' round pools that can be 52" or 48" deep. The brand of pool that they are for is a Coleman or Bestway pool.  The size of a plastic base is around 5 1/4" by 3 5/8" by about 7/8" thick. If you are looking for the gray or black color bases I have those on another listing. 

If you have older style 18' OD pool purchased 2+ years ago then this base can work for that pool also. The 18' OD pool needs to have the large frame. Check the dimensions to verify if this base will match your pool frame. 

 If you have a newer style 18' or 16' OD pool then you will need the smaller framed plastic base. 

If you need the smaller plastic base you can find it at listing number 274428467373 . You can copy this number into your ebay search box and ebay will take you to that listing.