The Supertech single valve spring for Toyota 2UZFE is listed as a single unit and available drop-ship only. Specified for the 2UZ-FE engine family, this single spring is offered individually to match that Toyota V8 application. The listing notes that the part is sold as a single item and fulfilled via drop-ship for the 2UZFE fitment.
Supertech Toyota 2UZFE Single Valve Spring - Single (Drop Ship Only)