Release-ring for inch size is white.

Variants
• CPS15M-5/16WU – Pisco Light Coupling 15 Series Bulkhead Tube Socket 5/16" Light Grey
• CPS15M-8W – Pisco Light Coupling 15 Series Bulkhead Tube Socket 8mm Light Grey
• CPS15M-8B – Pisco Light Coupling 15 Series Bulkhead Tube Socket 8mm Black
• CPS15M-5/16BU – Pisco Light Coupling 15 Series Bulkhead Tube Socket 5/16" Black