1) simple construction
2) sealed up well, paste tight, made up a whole with the framework aroud the screen
3) low maintain rate

Product material:
1) high strength Aluminum alloy,
2) ABS engineering plastics accessory monofilament plastic coated glass fiber fireproof gauze

Range of application:
All the inside side-hung windows

Product characteristics:
1) simple construction: only one framework around the screen, it can be took off and cleaned when not be used.
2) sealed up well, paste tight, made up a whole with the framework aroud the screen
3) low maintain rate: The gauze remains still all the time, so there's almost no attrition.
4) have an advantage on price
5) can be sold in the supermarket