... 2) Material specification: NBR, HNBR, EP/EPDM SILICON 1)size:404pcs purchase o-ring service ... )2) Material specification: NBR, HNBR, EP/EPDM SILICON3)box Color:blue,red,yellow4)Packing:shrinking ... 5mm1418mm2.5mm1519mm3mm1620mm3mm1722mm3mm1824mm3mm1926mm3mm2027mm3mm2128mm3mm2230mm3mm2332mm3mm2433mm3mm2535mm3mm2636mm3mm2737mm4mm2840mm4mm2943mm4mm3046mm4mm 404pcs metric EPDM rubber o-ring assortment kit