The Stamina Training Unit trains you to stay in the game longer. Practice by yourself before potentially disappointing anyone else more importantly yourself. One of the original Fleshlights, STU, continues to sell off our shelves with the bumpy texture and tight opening. This kit is even more valuable as you have: Lubricant, Shower Mount, Renewing Powder, and Guide for increasing your stamina. What more could you ask for? Alot!