"6 Bar Tray" Sample Box

"6 Bar Tray"  --- Plexiglass gang-box for preparing samples of monolithics that are cast, pumped, or hand-packed. The tray contains 6 bars (9" x 2" x 2") for evaluating permanent linear change, modulus of rupture, bulk density, and cold-crushing strength.  The tray may be dis-assembled and re-used.