30g tin. Avoid direct sunlight with the putty. Use 3w-5w 395nm UV Flashflight to cure. UV light is NOT included. Thickness 1-5mm putty requires 20 seconds - 5 minute cure time, curing time varies by thickness. Let rest for at least 30 seconds after curing before sanding or cutting. Avoid direct skin and eye contact. If you want to avoid extra sanding, you can use a shaping tool dipped in alcohol to shape the putty. Store putty in cool area (fridge for long term storage).