This tool makes it super easy to fill up to 48 standard round lip tubes (0.15 oz.) at once! Flip lip balm filling tray upside down onto a clean surface. It should be text side down. Insert top of lip tubes (sold separately) into tray. Once all lip tubes are placed, carefully flip the tray and tubes over and set down on counter. Ensure the tubes remain tightly pushed into the tray. Pour melted lip balm into tubes. Allow to harden. The silicone is durable and easy to clean. Measures 10” x 4 ½” with 48 holes approximately ½” dia. For use with our SM180 Lip Balm Tubes.