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JJ Yarn <br /> Polypropylene <br /> weave primary <br /> Thick urethane <br /> secondary <br /> Geotex tertiary <br /> GOOD BAD <br /> ForeverLawn° Premium Backing Ordinary Urethane Backing <br /> Exposed blades <br /> Secured blades <br /> 44, <br /> wool, <br /> MW r <br /> 7 W Thin, temperamental backing <br /> Stabilized backing Up to 3 times the Minimal amount of urethane <br /> standard amount of urethane <br />