Popular for stock and custom Harley-Davidson applications, as well as Honda, Kawasaki, Suzuki, and Yamaha metric cruisers. Stash Tube diameter is 2.200". Inner diameter is 1.900". Machined from solid Billet Aluminum and chrome plated. Caps feature a water-proof o-ring seal. Fits 1” to 1-1/4” Frame Tube.