AK-BETHEL ADMINISTRATIVE-WINDOW FRAME The Government requires commercial window components for nine employee residences at Yukon Delta National Wildlife Refuge, including 135 metal turn/tilt hardware ... AK-BETHEL ADMINISTRATIVE-WINDOW FRAME The Government requires commercial window components for nine employee residences at Yukon Delta National Wildlife Refuge, including 135 metal turn/tilt hardware kits, 135 full-height extruded-frame cam-locking insect screens, and 198 bottom-up/top-down blinds, of which 63 shall be blackout blinds.