World Block - 30 x 30 x 60 Knob Style Block Forms - The World's #1 Block Form Company

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30 x 30 x 60

30 x 30 x 60

These Knob Style block are 30”x30”x60” and require 31-1/3 cubic feet of concrete (making a 4,700 pound block)

Just about the simplest block form out there, the knob style block form makes life easy. With two knobs on top fitting into two knobs on the bottom, these blocks fit together like giant Legos®.