Sako Optilock rings with a 30mm tube diameter in medium height and black finish are expertly crafted from solid steel for durability. These rings feature a patented spherical fastening system that simplifies scope mounting, while the protective sleeve safeguards your scope from scratches during installation. Each pair is clamshell-packed and includes a hex key. Designed for scopes up to 75mm in diameter, with a height of 36.5mm. Bases are sold separately.