Image Item No. Description By  44851  Technic, Axle and Pin Connector 2 x 4 Double Sloped Catalog: Parts: Technic, Connector 1  45590  Technic, Axle Connector Double - Flexible Rubber Catalog: Parts: Technic, Connector 19  44809  Technic, Pin Connector Perpendicular 2 x 2 Bent Catalog: Parts: Technic, Connector 808  45573  Technic, Spike Connector Flexible with Four Holes, Raised Center Catalog: Parts: Technic, Connector 91  45575  Technic, Spike Connector Pin Double 3L Catalog: Parts: Technic, Connector 2