It’s High Grade Halloween. Treat yourself to some spooky savings. Use the code HIGHGRADEHALLOWEEN13 and get 13% off all HGs. Want to buy a scary amount of high grades? Get 31% off when you purchase 10 or more HGs by using the code HIGHGRADEHALLOWEEN31. Beware! Sale ends on November 2nd when the clock strikes midnight, Japan Standard Time.Â