Natural Sisal Fiber Type 1 Type 2 Type 3 Type 4 Sisal Fiber UG Grade Length: 110CM-130CM with a tolerance of 20%. Moisture: 10%-13% Impurity: 0-3% Classification per Grade: TYPE 1 - Colour whitish/soft cream, well brushed humidity maximum 14% without knots. Color: natural white, Brown and between white and brown. TYPE 2 - Colour cream/yellowish, well brushed humidity maximum 14% without knots. TYPE 3 - Colour cream/yellowish, well brushed humidity maximum 14%, without knots. REFUGOS (REJECT) - Colour brownish/green, humidity maximum 14%, presence of knots and high percentage of impurities. BUCHA (TOW) - Colour yellowish/brownish, humidity maximum 14%, presence of knots and a very high level of dust.