(250) 1/16" X 3/16" High Temp Silicone Rubber Tapered Plugs Powder Coat Coating Paint Masking Supplies

I use this to plug up the bottom hole in my underwater wet lens dome. Prevents the water from coming out during split shots and no more bubble lines! I'm so happy to have figured out this easy fix for my camera.

Have bought these multiple times and each time they have worked perfectly. Would highly recommend!