Check the listing for details. Cessna 310 Knob for Flap Switch Aluminum No Cracks. Condition: Used, Made in United States. Listed at 35.00 USD. This Cessna 310 Knob for Flap Switch is made of durable aluminum and is guaranteed to be free of cracks. It is a reliable and high-quality replacement part that is perfect for your aircraft. The knob is designed to fit seamlessly into your existing system and is easy to install. With a 90-day warranty, you can trust that this Cessna 310 Knob for Flap Switch will provide you with years of reliable service. It is a great addition to any aircraft and is sure to enhance your flying experience. Made in the United States, you can be confident in the quality and craftsmanship of this product.