A 22-year-old man from Los Angeles has been sentenced to about four years in prison for carrying 18 pounds of crystal meth in a backpack in Waikiki.

Antonio Perez Jr. received the 51-month sentence Thursday in federal court in Honolulu. He previously pleaded guilty to charges that he was involved in a drug trafficking ring. 

According to court documents, another man brought the meth when he flew from San Diego to Honolulu. Perez’s plea agreement says he met that man in a Waikiki hotel, where Perez loaded his backpack with 18 pounds of meth. 

The agreement says Perez carried the backpack to a Waikiki apartment, where he hid the drugs in a clothes dryer.

The estimated Honolulu street value of 18 pounds of crystal meth is $360,000.