You can combine two layers of curtains, one thick and one thin, using the double rod. The length is adjustable. All parts are sold as separate
RÄCKA / HUGAD Double curtain rod combination - white 210-385 cm (82 5/8-151 5/8 )
Window Corner Curtain Rod Connector Set of 2, Adjustable Curtains Rods Connector for Bay Windows Blinds with 1 inch Black Color Metal : : Home
Rod Connector Curtain Rod Hinged Connector Rod Corner Connector for Window brushed
Furnishland Set of 2 Brushed Steel Bay Window Curtain Rod Corner Connector, Fits up to 3/4-inch Drapery Rod : : Home
HUGAD curtain rod, black, 120-210 cm (47-83) - IKEA CA
Consider all the angles with the Corner Connector from Urbanest. This adaptable corner curtain rod connector has a hinged design, letting it fit in
Urbanest 5/8 inch Adjustable Corner Curtain Rod Connector Hinged Elbow for Corner Window, Matte Black
Window Corner Curtain Rod Connector Set of 2, Adjustable Curtains Rods Connector for Bay Windows Blinds with 1 inch Black Color Metal : : Home
IKEA HUGAD CURTAIN Rod Corner Bracket Curve Wall Mount Part # 602.199.20 Gray $9.99 - PicClick
IKEA HUGAD CURTAIN Rod Pole BETYDLIG Brackets Holder SYRLIG Rings Hooks White $10.74 - PicClick
HUGAD by IKEA Curtain Rod Corner Connector, Furniture & Home Living, Bathroom & Kitchen Fixtures on Carousell
IKEA White Curtain Rods & Hardware for sale