2-inch simple electric exhaust valve

Specification:
Valve Material: Stainless Steel and Aluminum Alloy
Pipe Material: 304 Stainless steel
Color to choose: Sliver (as picture show)
Quantity: 1 Set (Without Battery)
Size: 2 inches
Package Included:
1 x CNC Aluminum electric exhaust valve valve
1 x Remote Control and Receiver
1 x Extension Cable
1 x Stainless Steel Dump Pipe
2 x Flange Gasket
3 x Bolts and Nuts
Features:
1. Lightweight CNC Machined Anodized T-6061 Aircraft Aluminum Alloy
2. Uses Standard 3 Bolt Flange
3. High Polished Finish
4. Tig Welded Construction
5. Professional Installation is Highly Recommended
6. No Instruction Included