Slide-ON Case Compatible with Airtag for Dog Collar - Slide-on design, no hanging - no dragging or banging - Silicone made, scratch-resistant and washable. nontoxic, comfortable, sweat-proof. Diameters The width of the holes are 2.4 cm ( 0.94 in), fits for most common dog collars. Package Includes 2 * airtags holder