Affordable portable Grinder for Herbs. Use to break down Cannabis so you can roll your own joint or pack up your bong or pipe. 70mm. Assorted ColorsPlastic Grinder$3.00PriceQuantityAdd to CartProduct AvailabilityWARNING: This product can expose you to chemicals including Marijuana smoke or Mycerene, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.