Plastic Concrete Cube Molds, 150x150mm are one-piece units constructed of rugged plastic, used to mold consistent concrete compressive strength specimens for strength testing and set-time determinations following ASTM C403/403M, AASHTO T 197/197M and EN 12390-1 standards. Both models have inside dimensions of 150x150x150mm (5.9x5.9x5.9in) WxDxH.