GRAV has redesigned all of their standard water pipes to have a lower waterline and a better pull. The simple Straight tube with a disc perc is meant to offer a variety of water line options and tons of percolation. All these bases were given a thicker, more honed in design to be durable and long-lasting. The Ice restriction has been raised to prevent backsplash better. Go for the big rips with these new and improved straight pipes.