Trench Boxes & Gravel boxes: GME,Efficiency , Safe-T-Shore.820 shield,rock boxes(stone mizers).OSHA certifications. For more pictures, call or email. 704.906.7598 Shipping/delivery available Compare prices to new. Shield shown in picture is SOLD!!.Still available-> 820-6"wall 26' certification-$8700 (new is $13,000). 7.5cubic yard rock boxes-$4000