ProWrap™ Rod Building Thread as been in development for years and tested by rod builders. ProWrap™ thread is available in 80 colors in both Nylon and Color Fast – in three spool sizes; 100 yd, 1 oz and 4 oz. The 100 yd span spools work perfectly on power wrappers. ProWrap thread features strong tensile strength and bright colors pressure dyed for color consistency.