Level Quick (QL-QC-Pack) Red Leveler and Wheel Chock Interlocking Leveling Block Package Includes 10 Pack of Leveling Blocks with Storage Bag & 2 Pack of Wheel Chocks Leveling blocks have a 1-3/8" heigh with 3/8" adjustment Wheel chocks safely and securely interlock with included leveling blocks Constructed out of high density polypropylene and components are designed to be slip free Limited Lifetime Warranty