Image Item No. Description By  47296  Technic, Axle and Pin Connector 2 x 5 with 2 Ball Joint Sockets, Open Sides Catalog: Parts: Technic, Connector 1  50898  Technic, Axle and Pin Connector 2 x 7 with 2 Ball Joint Sockets, Rounded Ends Catalog: Parts: Technic, Connector 8  x1192px1  Technic, Axle Connector 2 x 3 with Ball Joint Socket and Axle Socket with Molded Light Bluish Gray Rubber Insert Pattern Catalog: Parts: Technic, Connector 1