This is a solid mid tier choice for vinyl siding. It is a thick .044 panel at standard 12' 6" length. Available in standard clapboard and dutch-lap profiles for a classic look. Centerlock features a unique in the industry mid panel (where to two 4.5" sections intersect locking system. This creates a flush to the wall look which helps minimize the appearance of seams. Where standard panels simply overlap with a notch out for the nailing hem, Centerlock has a positive interlock binding adjacent panels together. With a decent color selection and a lifetime warranty you won't be disappointed. A solid contender is not buying an insulated panel.