Standard Two Piece Base - 70 Express RVF BlackManufacture ID: 50377For maximum accessibility to the magazine or breech area of your rifle STD 2-Piece Bases are worth a look. Fluted for a customlook these bases are also ideal if you're after greater flexibility when it comes to mounting options for your bolt action rifle. Reversible bases are available for many actions accommodating a variety of scopes and action lengths. Additionally STD2-Piece Bases fit right-hand and left-hand actions. Long Range STD mounts provide 1/4 degree of built-in elevation.Warranty: Full lifetime guarantee. If any product has defects in materials or workmanship Leupold will at their option repair or replaceit free. Even if you are not the original owner.