Every arena should have good, solid obstacles to jump over. These Vertical Walls are a great place to start. They are solid, well built, and a good horse jump for beginning riders and horses. Add poles or planks above the wall to increase the difficulty of the jump. Construction details: 4 x 4 base, 2 x 4 style with the solid wall built out of 2 x 4s. Order 10' walls to fit under 10' rails or 12' Vertical Walls to fit under 12' rails. Made out of durable, strong, PVC, that does not need painting.