From the product description, check product page for current description, price and availability:

• 1. Solid Rustproof Material: Both mortar and pestle are made of food grade 18/8 stainless steel. Not only is it rustproof, it is also resistant to damage and corrosion by acidic food.
• 2. Durable and Stable: Made of solid metal, the pestle feels substantial in your hand and the mortar sits unbudgingly on your kitchen counter. Padding on the bottom makes it stay put even more.
• 3. Food-safe: Because stainless steel does not hold residue or leftover odor, all it takes is a thorough rinsing under the tap to get it ready for next use.
• 4. Messy Not: Translucent lid allows you to gauge your strikes while keeping flying debris from making a mess.
• 5. All Your Grinding Needs: This grinding setup will accommodate just about anyone’s grinding needs. From medical pills, to herbs and spices; from the pharmacy to your kitchen.