Reddit reviews Universal 1 Inch Plastic Depth Ring Adapter Spacer for 5.25 inches - 6 inches Car Speakers
We found 1 Reddit comments about Universal 1 Inch Plastic Depth Ring Adapter Spacer for 5.25 inches - 6 inches Car Speakers. Here are the top ones, ranked by their Reddit score.
Universal 1-inch Plastic Spacer Rings for 5.25-inch and 6-inch Round SpeakersInner Depth: 5-1/8"Made From ABS Plastic1-inch Allows Extra Mounting DepthFits most 5.25 inch - 6.5 inch Speakers | Oversized 6.5" speakers will not work with these spacers
Alternatively you could try these which you don't have to worry about water https://www.amazon.com/Universal-Plastic-Adapter-Spacer-Speakers/dp/B00CROVY02