Extension spring designed to absorb and store energy, providing resistance to pulling forces in various applications Features a wire diameter of 5.97 mm and an outer diameter of 43.82 mm, suitable for heavy-duty tension tasks Comes with a free length of 331 mm and an initial tension length of 334 mm, offering optimal performance in dynamic environments Made from high quality steel for durability and long-lasting use Product Dimensions Weight 2.73 lb Height 2 in Length 13.7 in Model Compatibility: 9400 9410 9450 9500 9510 9540 9550 9560 9580 9600 9610 9640 9650 9660 9660 WTS 9670 9680 9780 C670 CTS CTS II T5 400 T5 500 T5 600 T5 700 T6 500 T6 600 T6 700 T6 800 T550 T560 T660 T670 W540 W550 W650 W660 Additional models may not be listed.