LEAD FREE NON-TOXIC - SAFE FOR FOOD AND DRINK CONTAINERS. Conforms to ASTM D-4236 Labeling - CERTIFIED SAFE FOR K-12 SCHOOL USE .25 oz each of 12 popular colors of Western Underglaze in easy to use strips. Refillable and reusable. Non Toxic, School Safe, Lead Free, Food Safe when properly fired with clear glaze. Less waste! Containers seal tight. Don't dry out as easily as loose classroom bottles. Easy to manage. Teachers just pass out a strip to students. Saves time! Portable. Take Anywhere. Studio, classroom or home studio. Great way to try out many colors at once without having to buy larger quantities! Fires to all cones. 06 to 10 Each Project pack contains two 6-pot strips of colors Black White Silver Gray Redwood Brown Purple Royal Blue Bright Yellow Sky Blue Bright Pink Fire Engine Red Pumpkin Orange Light Green