Matl high impact rigid acrylonitrile butadiene-styren (abs) per mil-m-22544; light yellow in color per fed-std-595, number 13655; 1.750 in. L nom; 1.750 in. W nom; 0.024 in thk nom; item has 4 each holes 0.24-0.26 diameter nom through for purpose of securing to container