Chums Switchback Basics,
- Distinctive bright blue coloring for easy detection Reversible dual port retainer
- Top port for small or thin frames
- Bottom port for large or thick frames
- Fits over temples with rubber inserts
- Low thermal conductivity, chemical reactivity and toxicity
- Does not support microbiological growth
- Resistant to oxidation, ozone, and UV light
- 17” length, end-to-end
