Material: nylon and metal clips. Color: Black. Size: the shortest (relaxed state) 100-150 cm The longest (stretched state) 200-250 cm Weight: 132 g. Package includes: 2 x bed sheet straps Bed sheet fasteners: Made of high quality nylon and metal clips, highly elastic fit for most fitted sheet and bed sheet. These sheet tensioners hold your sheets in place without readjusting and keep them in place all the time. And never damage your leaves. Robust clamps: Wide elastic band provides a stable and stronger hold for heavy purposes. The metal clamps hold your sheet metal in place. Highly elastic bed sheet tensioners offer a stable and strong hold for your sheets. Adjustable Corner Bracket: The sheet holder is adjustable, which allows you to find the tension you want and keep your sheets neat and tidy all day. Easy to Use: Several simple steps to attach and hold your sheets to keep your fitted sheets from slipping off corners.