HONDA NSX Blank Key. This blank key is made of Monel, an expensive and highly corrosion-resistant alloy of nickel and copper that’s often used in marine engineering. Monel is so robust that cutting a key blank is said to be a highly risky undertaking that could easily damage your pride and joy. As with all genuine Honda products expect perfect fitment and performance every time. Part number 35113-SL0-A11. Suitable for Honda NSX's between 1991-1996.