Designed for use with all MSR Lightning snowshoe models and lengths 5 inches (13 cm) long to provide extra floatation when carrying more gear or moving through deeper snow At just 9 oz (0.26 kg) per pair, tails are light and small enough to carry on any trip Simple attachment system includes no moving parts or tools and can be installed without removing the snowshoes Measures 10 x 8.25 inches in total