Renfert COBRA Aluminum Oxide 50 µm White

Renfert COBRA is a high-purity aluminum-oxide dental abrasive for controlled sandblasting in the laboratory. Aluminum oxide is an exceptionally hard abrasive material, and the sharp-edged grain structure provides effective material removal and surface preparation. Renfert lists COBRA at approximately 99.7% Al₂O₃ purity.

This listing covers the white 50 µm grade in 5 kg and 12.5 kg package sizes. The consistent grit and dry packaging are intended to support predictable abrasive flow and repeatable sandblasting results when used with compatible dental sandblasters.

Features and Benefits

• Hard aluminum-oxide abrasive: Sharp-edged particles provide effective surface abrasion.
• High purity: Approximately 99.7% Al₂O₃ according to Renfert.
• 50 µm grit: Fine abrasive size for compatible dental sandblasting applications.
• Consistent handling: Controlled grit distribution supports predictable blasting performance.
• Multiple package sizes: Available in 5 kg canister and 12.5 kg bucket configurations.

Specifications and Available Variants