A fence panel and gate configuration whereby there are four horizontal members (stringers) built into the panel or gate. All residential fence panels at six feet high automatically include this additional horizontal rail. That’s why you see a little bit of jump in price when reviewing the residential, five foot high 3-rail pricing vs. the residential six foot high 4-rail pricing. This adding of an additional, fourth rail is also triggered in all industrial fence panels and gates at seven, eight, nine and ten foot heights. The puppy pickets option, when selected, also triggers the adding of an additional horizontal rail.