LTE blade antenna with SMB style connector.  This 5.5 inches long by 1.5 inches wide by 1/4 inch tall antenna comes equipped with a 10 ft. (3 m) cable and the antenna body is normally attached to an external surface with customer supplied epoxy.

This antenna is for new style 2103c, 2103ci, 2105c, 2105ci, 2105g, 6712c, and 6712ci modems with an SMB style connector. 

For older style 2103c or 2103g models with SMA connector:
Note:  When using "ci" equipment, the dual band antenna is recommended for optimal performance: