OZ works well through the early winter as a dropper. We offer these in two sizes the smaller which is tied on a #16 but is more like an #18.5 with a 2.5 black nickle tungsten bead. The larger size we off is a true #16 but on a jig hook with a 2.8 black nickle bead. The OZ nymph lights up on clear sky, high sun days in the winter. It most accurately represents a hendrickson nymph but will pass as other crawler nymphs.