[WINDOW SHADE SPOOL]: Pleated shade blind tensioner can be used to secure the tension cords to your shades, controlling its in the right place, clear color makes it hard to be noticed. [10PCS WINDOW TENSIONER]: Plastic spool: about 0.7"(16.5mm) in diameter, 0.6"(14.5mm) thick, hole: 0.1"(2.5mm), inner diameter: 0.4"(9mm), 10pcs/bag. [HIGH QUALITY PLASTIC MATERIAL]: Window covering hardware are made of high-quality plastic, strong and durable, hard to be worn out or broken, can sustain long-term use. [EASY TO USE]: Both sides of the roller are with holes, makes it easy to be installed on your shade, it stops rattle and holds the shade neatly in place, convenient for your daily life. [MULTIPLE USAGE]: Pleated shade hold downs are suitable for RV day/night shades, can be applied for home, bedroom, living room, office, school and etc, easily adjust tension to prevent slippage during travel.