m16x1.50 THREADED (NO adapters) 5 speed 6 speed ROUND Ball Real Hand-Laid CARBON FIBER SHIFT KNOB Gear Shifter Selector Type-R Type-S for Pontiac Firebird 16x1.50mm This is REAL Hand-Laid Carbon Fiber. Shift Knob is 16 x 1.50mm and will Fit Other Brands of Vehicle that have the same Shift Knob Thread. Threaded to your vehicle's thread pitch. NOT universal adapters like most cheap shift knobs. NO SET SCREWS!! These shift knobs have all-metal threads and will NOT wobble or fall off. Meets or exceeds OEM standards. NOT universal / Thread Specific / No Adapters / Threaded! Solid Aluminum wrapped in Real Hand-Laid Carbon Fiber and protected with a beautiful epoxy resin. VMS Racing Brand (NOT Generic). Real Hand-Laid Carbon Fiber. Unsurpassed fitment and finish.