<https://www.tech-tool.com/product/fwd-door-window-snap-vent-optional-3/>
<http://schema.org/description>
"BK117-1004-3 is a Fwd Door Window LH (Snap Vent Optional) manufactured for Airbus Helicopters. This replacement window is compatible with Airbus BK117A1, A3, A4, B1, B2, C1."
<https://www.tech-tool.com/product/fwd-door-window-snap-vent-optional-3/>