DIY Magnetic Window Screens

https://www.amazon.com/gp/aw/d/B08XYXPYNQ?psc=1&ref=ppx_pop_mob_b_asin_title Purchased 2, do not work for my windows, cannot return. Purchased for $40 each at the time (last year), currently on sale for $26 each. Price listed is for one, double for the set.