Weapons Hub EntryEdit
Also referred to as the "Type-1 Antipersonnel Grenade".
According to information found on Halopedia, it has a diameter of 15.2 cm (5.98 inches), which, they claim is about the size of a baseball, despite regulation baseballs being sized between 2.875 inches and 3 inches.
Further Storyline information is availible here: Halopedia Information Page (external link)
Blueprints are not availible on the 405th Forums.
To my knowledge, no 3d models (other than pep) are currently available for this item. If you are aware of any, please add a link to them from this page.