Ives 5BB1 4.5X4.5 652 TW8 Electric Hinge 8 Wire Satin Chrome
The Ives 5BB1 electric hinge is recommended for medium weight doors, which means less than 150 lbs. It has a 5-knuckle ball bearing hinge. It is 4.5" height x 4.5" width. And it is standard weight.
The 5BB1 is also recommended for use with a door closer. And it comes with a satin chrome finish.

Ives 5BB1 Electric Hinge Image