SIZE
The Curved Leveler: 11.4"L X 6.9"W X 4.1"H ; 5.2 lbs
The chock: 8.3"L X 6.9"W x 3.3"H; 1.4 lbs
The rubber grip mat: 20.2"L X 7.1"W x 0.3"H ; 2.2 lbs
The underside of the curved levelers and the upside of the chocks both have deep convex lines-making them work well together, to provide the most secure hold.