TEC Platen Roller (Black rubber roller) A platen roller is a component that creates pressure to drive labels through the printer. This part is now obsolete. Please see below attachment for trade
Original Rubber Platen Roller for 1940s Underwood M Typewriter | eBay
Sound comparison of a rubber platen and a cork platen on a Remington KMC : r/typewriters
Is it worth replacing the rubber on my typewriter platen? – Mr & Mrs Vintage Typewriters ltd