BT5, BT20,BT50 Engine Mount Parts, for Model Rockets, (27pcs) | EST3181 | Estes

BT5, BT20,BT50 Engine Mount Parts, for Model Rockets, (27pcs) Includes 27 parts to build engine mounts. Perfect for the do-it-yourselfer! 27 Pieces 3 each. BT5 body tube. 2 inches long. 3 each. BT5 yellow engine blocks. 3 each. BT5 mylar engine hook retainer rings. 3 each. BT20 body tube. 2.75 inches long. 3 each. BT20 engine blocks. 3 each. BT20 mylar engine hook retainer rings. 3 each. BT50 body tube. 4 inches long. 3 each. BT50 yellow engine blocks. 3 each. BT50 black engine hook retainer rings.