Sumac Gallnut Extract 4 oz dyed firestar The 36 gauge moves a a myrob 16 The 36 gauge moves a good amount of fiber per punch while leaving a noticeably smoother surface than the 32 gauge The Reverse Mix brings together all three reverse needle gauges — from the aggressive 36 gauge to the delicate 40 gauge — giving you the full range of texture and fur effects in one pack Sumach Gallnut is a natural extract that is produced from the Chinese Gallnut and has been especially developed for the textile industry This material is very high hydrolysables tannin and yields very low color making this a perfect mordant lighter dye colors