The Leupold Alumina 32-33 Flip Back Lens Covers are an excellent addition to an already excellent riflescope. These lens covers will fit 32mm objective lens Leupold riflescopes built after 2004 and also the VX-3 and VX-3i 1.75 – 6 x 32mm scopes. These lens covers use a strong magnet to keep them securely closed, and 3 O-rings to keep the elements out.