Construction: Designed with silicone, our pen holders effectively combine durability with strong magnetism. They adhere to metal surfaces such as refrigerators or can be used on non-metal surfaces. These features make our pen holders the perfect solution for all your storage requirements. Universal Pen Compatibility: Molded from reusable, non-deformable silicone, our pen holders integrate an innovative two-way elastic loop design, ensuring a snug fit for all pen sizes, ranging from 6 to 20mm. These holders can be slipped onto the pens without causing any disruptions to your writing, providing convenience and eliminating the likelihood of misplacing your pens. Easy to Use: For maximum magnetic , make sure the broadest area of the pen holder is in contact with the metal or magnetic sheet. Do note that the side with holes is not to be used for adsorption. Versatile Use Cases: In addition to pens and markers, these holders can be used to control charging cables on your desktop, act as refrigerator stickers, or organize items like keys and scissors weighing under 200g. These holders can be attached to any smooth and can be removed in seconds, making them incredibly versatile and useful in a variety of settings. Colour:Black Material:Silica gel Package Contents: 10 x silicone pen holder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.