Tempress Slam Hatch - White The Tempress line of slam hatches are both functional and stylish. The Slam Hatch is manufactured from glass-filled polypropylene and engineered for strength and reliability. Tempress slam hatches are perfect for heavy traffic areas, and can easily handle folks standing or walking across them. The slam hatch features an easy close slam latch that creates a watertight seal simply by closing the hatch. Tempress slam hatches are constructed using a patented integral hing