ideal for smaller doors (9 wide x 9 high or less), the foam dock seal with head pad model provides a positive seal between internal and external environments. it seals automatically as the vehicle is backed against the ......ideal for smaller doors (9 wide x 9 high or less), the foam dock seal with head pad model provides a positive seal between internal and external environments. it seals automatically as the vehicle is backed against the foam pads. built of heavy-duty construction including roll-formed tufsteel galvanized steel, it offers long life with minimal maintenance.