Make your sliding patio doors smoother and more stable with the SMOO 345-HL-100-J-S-32-8-01, engineered to match the performance of Truth End Adjust 1990 tandem rollers for vinyl, aluminum, fiberglass, and steel doors. Pre-adjusted to fully retracted for easy, hassle-free installation out of the box. The housing features side slots that tie into mating walls in the door profile, delivering extra stability. The SMOO 345-HL-100-J-S-32-8-01 is a reliable, high-performance alternative for replacing Truth 1990 end adjust tandem rollers.