Module Double Down Downtube Shield Protector The Double Down Kit includes a Stealth Downtube Shield for the lower part of your downtube and a Clear Downtube Shield for protection against abrasive tailgate pads. Module Downtube Shields are perfectly sized for Carbon and Alloy downtubes. Our domed bicycle frame protectors feature a 1.25 mm polyurethane dome which absorbs impacts and rebounds to its original shape giving your bike frame maximum protection against the elements. Protect your frame from rocks, sticks, trail and road debris and even that rough tailgate carrier. With just the right amount of flexibility and super strong adhesive, our domed protectors fit to your frame and stay in place!