Lift from a variety of different starting heights with the sts stackable technique box set key features of the york sts stackable technique box set set includes 2 x 376mm stackable plyo box 2 x 6152mm stackable plyo box 2 x 12304mm stackable plyo box 2 x sts stackable scooped technique box 12mm high density rubber is used to cover the top of the boxes which generates a superior level of grip boxes are stackable in whichever combination is needed the technique box has a moulded scoop to