Portable and dustproof design which is perfect for keeping your toothbrush head in good condition. Compatible with round toothbrush heads including Oral-B EB20-4, EB18-4, EB25-4, EB50-4, EBS17-4, and EB17-4. Size: 6cm x 2cm x 2cm. Get a pack of six protective electric toothbrush head covers. Round covers made from clear PC material. Electric Toothbrush Head Covers | Living Social