Can help pleasse

I have for or fiver swf files all with own class files.

In each class i have the filters and i call it, example
PHP Code:
var dropShad1:DropShadowFilter = new DropShadowFilter(args args args);
var 
dropShad2:DropShadowFilter = new DropShadowFilter(args args args);

// and i use it like so on movieclips, 
myClip1.filters = [dropShad1];
myClip2.filters = [dropShad2]; 
how can have one filters class and call it in each other class please

Thankings