outward casement window with manual opener: American(European) outward casement window: 1)opening wide. 2) Good quality hardware, open(close) easily and smoothly, safe and reliable. 3) matched fly screen can install(remove)easily for clean. 4) multi-lock and high quality sealed rubber strip, soundproof, airproof and waterproof. 5)charactristic drainage system design, prevent the water and dust into the room