Camco, Curved Leveler & Wheel Chock, Easy Drive On Leveler Adds Up To 4" In Height, Honeycomb Design Makes Leveler Lightweight But Durable, Included Chock Has Non Slip Rubber Grippers On Bottom, Compact Length Makes Leveler Compatible With Tandem Wheel Spacing Without Modification, Designed For Use With Trailers Up To 30,000 LBS.