Wahoo 109 Backing Plate w/Gasket - Anodized Aluminum MSRP: $34.99 109 Backing Plate with Gasket - Anodized AluminumUse with the Smooth Slide Rocket Launcher. Manufacturer : Wahoo Industries Manufacturer Part No : 109 Qty in Cart: 0 Quantity ( in cart): Decrease Quantity: Increase Quantity: Price: MSRP: $34.99 Subtotal: Add to Cart