66PCS 3 Colors Anti-Lost Silicone Rubber Rings 20mm Inner Diameter Lostproof O Rings Adjustable Necklace Holder Pendant for Necklace Lanyard Pens Device Keychains Office Supplies DIY 1 Box 66Pcs Anti-Lost Silicone Rings: Comes with 66pc rubberized silicone grommets in enough quantity to meet your everyday needs, 3 colors: red, blue, black, 22 pieces of each color. 20mm Silicone Pendant: These silicone pendant rings measure approximately 28.5x24x7mm with an inner diameter of approximately 20.5mm, all of them packed in a box(22.8x12x1.7cm), which make it easy to store and prevent parts loss. 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. High Quality Material: The rubber rings are made of eco-friendly 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 Wide Applications: Smart silicone rings can use for pendant on phone, key ring, pens, lanyards, USB flash disk and some similar devices. This would be a best helper for your friends in office, home,or outdoor activities.