4 x 4 Twill Fiberglass Cloth - Fiberglass Cloth Supply and Education

The best example we have of a 4 x 4 twill weave fiberglass cloth is the high thread count style 7783.  Style 7783 is an 8.9 oz/sq yd fiberglass fabric with a thread count of 58 x 54 ends/inch and uses the yarn ECDE 1/0 in both the warp and fill.  This fabric is very similar to 7781 in that it uses the same yarn and is close in thread count differing of course with the type of weave.

Here is a little closer view of the 4 x 4 twill style 7783.