Blocks and Retaining Walls Blocks and Retaining Walls Block Concrete 48″ (Set of 30) HO N Z $4.00 – $5.50 Select options Blocks and Retaining Walls Block Concrete 58″ smooth top (Set of 30) HO N Z $5.68 – $7.35 Select options Blocks and Retaining Walls Block Concrete 58″ with top detail (Set of 30) HO N Z $5.68 – $7.35 Select options Blocks and Retaining Walls Block Concrete 72″ (Set of 30) HO N Z $5.68 – $7.35 Select options