Black Round Head Hinge /BN color 1)Iron materials 2)Size:3.5"*3" /round head/0BB 3)Loose pin 4)Black nickel plated color Black Round Head Hinge /BN color Hinges Model SizethicknessBall BearingTip3.5''×3'' 2.0mm/2.5mm/2.8mm/ 3.0mm 0BB/1BB/2BB Ball/Flat/Crown/etc. 0 ball bearing hinge, Ball Head Tip Loose pin other types are also available.Surface Treatment:SN/GP/GB/AC/AB/BN/CP etc.Pin:Fixed pin/ ...