The 4106J Spark Plug is the perfect match for your 3WF-20, 3WF-3/2.6 Mist-duster Knapsack Sprayer Mister Duster. It provides a reliable ignition solution, ensuring optimal performance and engine longevity. This substitute part, B2LM BR2LM B6S, comes in two pieces, making it easy to replace a worn-out or damaged spark plug. The high-quality construction ensures accurate fitting and optimal performance, reducing the need for frequent repairs and maintenance. With its simple design and ease of installation, this spark plug is not only a cost-effective solution but also a time-saving investment. Trust in this product's durability, reliability, and effectiveness, making it a must-have for any needs sprayer, mister duster, or related equipment.