The 14106NOS Motorcycle bottle brackets are CNC machined from billet aluminum and are designed to work with 1 1/4" and 1 1/2" frame tube diameters The 14106NOS will securely hold a 10oz nitrous bottle. NEEDED FOR INSTALLATION: 1. 1" Socket 2. In./lb. torque wrench 3. Ft./lb. torque wrench 4. Vice with aluminum jaws such as 1004ERL, found on the Holley website, or another method capable of holding the siphon tube without deformation. 5. Medium strength thread locker such as Loctite 242® or equivalent. 6. Tube/pipe/conduit bending tool with minimum 3" radius