if possible a curved needle but a normal heavy darning needle will go through most hypalon if you go steady ,,,i raid the wifes sewing box ,,, over here in england you can buy cheap sets of needles and there is always a few curved ones in that no one seems to use nowa days ,, a small pair of long nose pliers helps , but you will need to push it through with something otherwise you will push it into your hand , use nylon fishing line or rot proof thread of some sort ,
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