Helicopter operators count on DART Aerospace Crosstubes for durability, compatibility, custom heights and cost savings. Our Crosstubes have been designed for compatibility with both DART Round-I-Beam™ and OEM Skidtubes and are easily installed using split bolt-on saddles. Our Crosstubes are manufactured from high strength aluminum or stainless steel for superior corrosion resistance and durability. Discover DART Crosstubes.