Solidlock®; Pro 20, 330', 949-6, Professional Strength Fixed Knot Cattle Fence, 12.5G, Class 3, Mixed Knot Design Combined with High Tensile Wire, Strongest Woven Wire Fence You Can Buy, Design Locks the Line Wire & Stay Wire Together, Giving You Maximum Strength, Little to no Maintenance, Great for Cattle, Bison, Sheep, Goat, & Swine. Strongest woven wire fencing. Tough and durable: ideal for all types of livestock and exclusion fencing. Locking fixed knot ties the vertical stay wires and the horizontal line wire together. Requires little to no repeated maintenance. Pre-installed Gripple® joiners save time and labor costs Class 3 coating guaranteed to last at least 20 years