MAYTEX Heavy Duty Rings 4.6 out of 5 stars 9,709 $6.51 source https://www.amazon.com/Maytex-Double-Roller-Curtain-Brushed/dp/B0042ZB1YI/ref=zg_bs_1063236_14/147-2896354-4689453?_encoding=UTF8&psc=1&refRID=T7EKQB4N6V7P12TS2MVP
