30PCS RUBBER RING LANYARD SET: Comes with 24pcs silicone rubber rings in 6 colors,and 6pcs necklace lanyard ,quantity and color enough to meet your daily need QUALITY MATERIALS: The rubber rings are made of high-quality silicone material, lightweight and good elasticity, which can firmly fix the pen on the ring. Lanyards are made of polyester, not easy to fade and can be used for a long time 20MM INNER DIAMETER: Each silicone rings is about 29x24.5x7mm, 20mm in inner diameter, with a hole of 3mm, the lanyard is about 76.8cm long, 3.2mm diameter. These can help you find or keep your small items quickly and easily. EASY TO USE: The loss-proof silicone rings can be used along with lanyards, also can be used separately as a decoration, You can carry it as you like, hang it on the key ring, suitable for any occasion, and protect your equipment in different ways. WIDE APPLICATION: Smart silicone ring with lanyards can use for pendant on phone, key ring, pens, USB flash disk and some similar devices.