Hopkins Towing Solutions Stick On Level Small. x 1 in.) but useful. Stick-on mount. Durable high-impact black plastic construction with easy-to-read yellow-green vial. Two levels are required to level RV's - one for length one for width. Features of Hopkins Towing Solutions Stick On Level Small size but useful Durable high-impact plastic construction Easy-to-read display Two levels required to properly level RV Package Contents: Hopkins Towing Solutions Stick On Level Hopkins Towing Solutions 3925: Stick On Level Small