Models View all Venous Access Port 1 30 0 Absolute Pressure Sensor, ST Microelectronics, Part Number LPS28DWF 2 14 0 Mini Duckbill Valve 0 105 0 Honeywell Differential Pressure Sensor 2 50 0 Max-Air PAPR Disposable Lens Cuff 0 21 0 Max-Air Filter and Filter Cover Cap Replacement 6 72 0