Tork OptiCore Mid size Toilet Paper Roll White T11 Balance restroom cost and performance with Tork patented OptiCore technology. The unique two part core design ensures maximum use of each tissue roll, while closed dispensers promote hygiene and deliver soft, absorbent tissue. The high capacity roll keeps dispensers filled longer, reducing waste and maintenance costs. Additionally, OptiCore rolls have 25 percent less core material than conventional toilet paper rolls.