The 2150 is only available in the single hung window style. The 2150 features double strength glass, high performance interlocking tilth sashes and an innovative locking system for added protection and structural stability. This window is built to withstand hurricane-force winds and rain. The 2150 features heavy weather stripping all around the sashes and at the meeting rail to protect against water penetration. The 2150 has an efficient draining system to properly keep water out.