Bought new from Amazon, put on once and then put back in box as we find we only use the solar cover. Made for steel framed pools. Deluxe round pool cover UV resistant Prevent water accumulation and is easily secured with the included rope ties Fits 18-feet diameter pools Drain holes to prevent water accumulation https://www.amazon.ca/Intex-Deluxe-18-Foot-Round-Cover/dp/B00178I5NI/ref=sr_1_15?crid=1FSXABXLMVHKV&dchild=1&keywords=18%27+round+pool+cover&qid=1595983064&sprefix=18%27%2Caps%2C241&sr=8-15