K’Nex rippin’ rocket roller coaster Older set. Is missing 3 pieces. 3 small connector pieces. We were able to use a couple spare parts to substitute and make the coaster work. If you have other K’Nex sets you probably have them 3 pieces. Common pieces. No box, but has original instructions. I have to weigh it when we take it back apart for shipping. Message me before buying and I’ll check the weight for cheapest shipping cost.