Naturally, the more you buy of any one shape, the lower the price. So we suggest that you estimate carefully how much you intend to use during, say, the next 6 months, and order on that basis. If you think you will need 6 feet of 1/16 Flat U Lead, you would order a 6-Foot Length, #8065. If you can use more, and would like to save money, order #0508, a 45-pound Mini Case with 880 feet in it. A 132-pound case (#8508) contains as much as 2,640 feet. Whip out your abacus and see what you save on larger quantities.