GBU-28
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The GBU-28 is a 4,000-pound class laser-guided "bunker busting" bomb produced originally by the Watervliet Arsenal, Watervliet, New York. Wikipedia
Length: bomb body 155 inches (390 cm), 225 inches (570 cm) overall
Designer: Defense Systems and Electronics Group (Texas Instruments)
Diameter: 16 inches (40 cm)
In service: 1991-present
Launch platform: B-2 Spirit; F-15E Strike Eagle; F-111 Aardvark
Manufacturer: Raytheon
Mass: 4,576 pounds (2,076 kg)