Welcome to Allen Instruments online store Welcome to our online store Seco 2152-04-BLK Optical Plummet Twist-Focus Tribrach SKU 2152-04-BLK-A $158.95 In stock Quantity: 1 Add to Bag Product Details The Seco 2152 Series Tribrach with optical plummet features a twist focus, 2.5x magnification and leveling screws with center line. It has an 8 minute circular vial, 3-prong forced centering and a 5/8” x 11” base. Easy range of 1.5 to 50 ft. Save this product for later Favorite