This is a TT120 scale model of an 8-shoe LNER style 12' wheelbase 21'6" ohs wagon chassis. You may want to add a vacuum cylinder and a cross-shaft between the v-hangers. It is designed to fit under my Conflat B wagon body. If you want to fit NEM couplers to the wagon, the coupler pocket sprue I have uploaded will provide you with 8 of them (enough for 4 wagons) to slide in one each end of the chassis before fitting the body and headstocks over the top, which should keep them in place. Don't glue the body on too hard, in case you need to change a broken pocket.