Product Detail 5 Year Factory Warranty The classic mechanical balances from Ohaus. Setting the standard for nearly 75 years Features three notched and tiered beams with center reading Spring loaded zero adjust compensator. Optional Vinyl Dust Cover #706-00 Sold Separately . The "Ohaus 750-SO Mechanical Triple Beam Balance Scale with Stainless Steel Plate Weigh Pan, Capacity: 610 grams x 0.1 gram" is best product for you. We recommended Ohaus 750-SO Mechanical Triple Beam Balance Scale with Stainless Steel Plate Weigh Pan, Capacity: 610 grams x 0.1 gram