https://www.jwwinco.mx/en-us/products/1.1-Operating-with-handles-and-knobs/t-handles/TH-Polypropylene-Plastic-T-Bar-Knobs-with-Tapped-Insert
T-Bar Knobs TH | JW Winco
Lightweight polypropylene T-bar knob with metal insert for firm tightening
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https://www.restorationonline.com.au/handles/ceramic/cabinet-handles/t-bar-knobs
Ceramic T Bar Knobs | Restoration Online
t bar knobsceramicrestorationonline