The 202K121-3-0 is a straight molded boot from the Raychem 202K1 product family, engineered to offer robust strain relief and environmental sealing for cable-to-connector transitions. This heat-shrinkable component protects against abrasion and mechanical damage in demanding applications. Based on its part number, this boot has a size code of 21, utilizes material system -3, and is supplied without a pre-coated adhesive (adhesive code -0). It is well-suited for use in industries such as military, marine, and rail where high-reliability connections are essential.