... hole shap : Round, Square, Long round, Triangle ,Scale ,Diamond, and Oval etc.Aperture : In general it is advisable to use ... , straightRound - slot, straight patterns are ideal for sorting and gradingsolids when used in a shaking application.7.Hexagon patternsIdeal ... :There are tolerances on thickness ,bars,openings,flatness,and shering for perforated products.As with other manufacturing processes, ...