Ball Bearing Hinge

hinge with UL certificate. A, 80% usage for fire rated door. B, Different material: SS201,304,316, Steel. C, Different size: 4.5”*4”*3.4mm 4.5”*4.5”*3.4mm D, Different location: CECO, Amweld, Republic, Curries. E, Popular in US standard doors. F, UL certification.


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