An extrusion apparatus having deckles defining the web width, is well known. The deckles may be internal, external, or an external/internal combination such as an external boat deckle with internal deckle members. U.S. Pat. No. 3,829,274 to Melead exemplifies an external/internal combination in which a rack and pinion mechanism provides for adjustment of the external boat deckle and for movement of internal deckle rods. In film extrusion, an external deckle member disadvantageously results in a comparatively larger gap between, and limits the relative positioning of, the exit orifice and chill rolls.