The Corner Connector Advanced Add-On Pack contains a large assortment of corner connectors, useful for creating rigid connections in many VEX IQ applications. Included in pack: * 20 X 1x Wide, 1x1 Corner Connector (228-2500-129) * 12 X 2x Wide, 2x2 Offset Corner Connector (228-2500-136) * 12 X 2x Wide, 3x2 Corner Connector (228-2500-137) * 8 X Double 2x Wide, 2x2 Corner Connector (228-2500-220) * 16 X Double 2x Wide, 1x2 Corner Connector (228-2500-271) * 12 X Double 2x Wide, 1x2 Offset Corner Connector (228-2500-274) * 16 X 1x Wide, 1x2 Corner Connector (228-2500-279) * 16 X Triple 1x Wide, 1x1 Corner Connector (228-2500-1250) * 16 X Triple 1-2-1x Wide, 1x2 Corner Connector (228-2500-1251) * 12 X Triple 2x Wide, 2x2 Corner Connector (228-2500-1253) * 16 X 1x2 Left Chassis Corner Connector (228-2500-1254) * 16 X 1x2 Right Chassis Corner Connector (228-2500-1255)