- Komet Ceramic Crown Preparation Kit 9 x Burs in Plastic Block. - Package: - 6837KR - 314 - 012. - 6856 - 314 - 021. - 6856 - 314 -018. - 6856 - 314 - 012. - 6379 - 314 - 023. - 6836KR - 314 - 014. - 8856 - 314 - 021. - 8856 - 314 - 018. - 8379 - 314 - 023. **For further product information , please contact Chat support**