Vintage K'NEX | OEM Authentic Lot of 100+ Red Connectors Vintage K'NEX | OEM Authentic Lot of 100+ Red Connectors 3‑way triangle connector with 3 angled connection points forming a triangular layout. Used for angled joints, triangular bracing, and compact structures. Preloved with some wear including discoloration or yellowing of pieces or stretching on the plastic.