Bommer
4 x 4 x 1/4 Radius Perma-Door Spring Hinge, Pair, Bommer LB4321-400
The Bommer LB4321-400 is a pair of Perma-Door Spring Hinges, designed for specific door and frame template locations.
Constructed from durable steel, these hinges are UL Listed for fire door applications and feature easily adjustable spring tension for precise door alignment.

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