a spinal fusion implant device , and method of use , for promotes device for promoting a spinal fusion between neighboring vertebrae . the spinal fusion device may be located within the intervertebral disc space and includes a pair of plate member that preferably have flat support plates for contacting and resting against the softer , central cancellous bone portion of respective endplates of adjacent vertebrae . the support plates have a front template portion that is substantially orthogonal to the flat support plate and is bent in a direction to communicate with the anterior surface of the hard cortical endplate the respective vertebrae . the flat support plates are provided with a central channel in which a support strut may be placed . the support is configured to vary the distance between the support plates such that the height of the apparatus proximate the anterior end is greater than the height of the device at the posterior end whereby the natural lordosis of the spine is maintained after the apparatus is installed . the support strut may be selected from a set of support struts of predetermined height and angle , to alter the vertical distance between the support plates to customize the apparatus to fit a given patient . channels formed , on either side of the support strut , are filled with bone graft material and contact the endplates of the vertebrae through large openings in the flat support plates to facilitate fusion .