This is cut from a roll of gut. Manufacturer's Description: Made with polyolefin and featuring lemon peel processing, as well as SMD technology (Standardized Molecular Distribution), which optimizes the distribution of material molecules to enhance hold, further improving tension maintenance, spin performance, and control. Because it's black, it matches any racket. Features: Soft hitting feel Excellent grip Generates spin If stringing a single racket, I can string a 100 square inch Pure Drive or VCORE with 10m, so I think it's a sufficient length. Because it's soft, it gives the impression of breaking more easily than regular poly strings. In my opinion, I think 130 is better than 120 or 125 in terms of balance, as it's less likely to break, the ball sits on the strings better, and the feel is better. I am not considering lowering the price.