The Clifton Straight is an 8" tall block with a large 1 square foot coverage designed to get your projects done faster! The Clifton series also features a rear lip system that provides a 3/4" backset. The rear lip allows for fast and easy installation, thus reducing labor costs and eliminates the guesswork with a uniform setback using no mortar or pins. The Clifton is also lighter than the competitor's block, with a hollow core design that not only eases installation, but helps with drainage and connection between the units when the cells are properly filled with multi-purpose gravel.