Schaub and Company Northport 1-3/8 Inch Diameter Square Matte Black Cabinet Knob 219-MB | CabinetParts.com
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Square "Milli" Matte Black Cabinet Knobs and Drawer Pulls – Forge Hardware Studio
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GlideRite 1.375-inch Matte Black Square Cabinet Knobs (Pack of 25) - On Sale - Bed Bath & Beyond - 9565780
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