hot shoe protection cap for Nikon speedlights.
It protects the joints from dirt and mechanical damages.
Compatible with:

• NIK. Speedlight SB-5000, SB-700, SB-500, SB-300, SB-900, SB-910
• NIK. Wireless Close-Up Speedlight System R1C1 
• NIK. Wireless Speedlight Commander Unit SU-800​