Winderosa manufactures the highest quality gaskets for the two cycle engine industry in its modern computer controlled facilities in the USA. . Winderosa's extensive range of high tech materials provide unmatched reliability and performance for the demanding needs of todays power plants. . Winderosa distributes products to over 40 countries on six continents. This exposure to varying fuels and climates is the ultimate field test. This is for HR Carbs One per carb is needed.