Ade Advanced Optics Crusader 4-48&times;56 Riflescope with Iluminated Mildot, 35mm Heavy duty one piece main tube provides the foundation for precise lens alignment and other components Extended-range tactical riflescope with 4-48x magnification and 56mm objective lens Illuminated Reticle: Red or Green The use of water resistant sealants, synthetic grease and secure O-ring seals protect against fogging 35mm tube diameter; includes mounting rings; matte black finish, Life time warranty