Lot of 6 rubber bands for glasses. If you have your lanyard & your rubber grommet has deteriorated, you can replace it yourself at home. Just open the washer & put in your new rubber. You can add it to your mask hanger to have two different fasteners. Pack of 6 und choose between black & white color. Material: Rubber Size: 20mm x 6mm (6/8 x 2/8) Hole size: 5.5mm x 3.3mm (2/8 x 1/8) Thickness: 4.6mm (1/8) Color: White or Black Quantity: 6 Rubber Eyeglasses Chain Holder/Rubber Bans For Glasses Replacement Gummies Loops Chains