SprintRay Pro 2 Optical Panel The Optical Panel is the beating heart of Pro 2, providing incredible precision and speed. This aluminum-and-glass panel slides easily into the Pro 2 directly below the resin tank, providing a high-contrast, 35-micron mask with zero distortion. Expected life varies depending on usage. Compatible with SprintRay Pro 2 3D Printer. SprintRay Pro 2 Optical Panel The Optical Panel is the beating heart of Pro 2, providing incredible precision and speed. This aluminum-and-glass panel slides easily into the Pro 2 directly below the resin tank, providing a high-contrast, 35-micron mask with zero distortion. Expected life varies depending on usage. Compatible with SprintRay Pro 2 3D Printer.