Bommer LB4390C-450 4.5" x 4.5" Stainless Steel Single Acting Spring Hinge - Full Mortise

Bommer LB4390C-450 4.5" x 4.5" Stainless Steel Single Acting Spring Hinge - Full Mortise
The Bommer LB3490c-450 Single Action Spring Hinge is made of Stainless Steel  and is Full Mortise. Bommer LB3490C-450 spring hinge is non-handed, and UL listed for fire door applications.