A West Virginia middle school has joined the legion of homemakers, businesses and other places to produce masks for the health care industry. Andrew Jackson Middle School in Cross Lanes said its staff used a 3D printer and a print file to produce its first KnightMasks this week in response to a request from the West Virginia National Guard for basic medical supplies. The KnightMasks are being donated to nurses in the intensive care unit at St. Mary’s Medical Center in Huntington. The mask has two parts: a face shield and a filter holder that can contain a 2.5-inch square of medical-grade fabric. It allows for an N95 or surgical mask to be cut and made into six filters for the KnightMask.