Have cap block. Measures 4" tall x 8" wide x 16" long. Price at big home repair store is $2.68 each plus tax = $2.94 total each. Made of concrete/cement. All bought from the big store. Have almost 1,000 remaining. First come first served. Cash only for 1 or 100 till gone. Blocks available for pick up 7 days per week. Call first.