Eco-Friendly Material: Made of nylon-coated metal, durable and eco-conscious. Versatile Length: Available in lengths from 7-50cm, suitable for various calendar sizes. Strong Wire Thickness: 2mm/2.2mm wire thickness ensures robust construction. Multiple Colors: Offers an assortment of colors including blue, gold, orange, red, gray, black, white, green, and silver. User-Friendly: Easy to install and use for both office and school settings.