SUSTAIN® Large is a trapezoidal thoracolumbar intervertebral fusion device, available in both PEEK radiolucent polymer and titanium, designed for an optimal fit while maximizing both surface area and graft volume. The expulsion resistant surfaces are contoured at an 8° lordotic angle to maximize contact area and help restore the natural curvature of the spine. The implants are available in titanium or radiolucent polymer (PEEK) to allow radiographic visualization of fusion.