Brass stem band. 1/2 inch wide by 1/8 thick half oval. Not pre-drilled. Sold in 4 ft so if you need 8 ft. or full length of 12 ft, order multiples. This product is commonly found on older style wood canvas canoes or on keels of row boats. NOTE: Single 4 ft. pieces are shipped straight. Anything longer will be shipped coiled. So if you order 2 - 4 footers, it may be one piece of 8 ft. coiled. This is due the high cost of shipping long items. If you wish it shipped straight, then surcharges will apply and we will contact you for extra charges before shipping.