The 320i has a black polycarbonate rear housing with a durable hi-temperature front housing. Cryogenically treated as standard for increased performance.
Improvements have been made to the Perma-Lock terminations. The faceplate set screws are now constructed of stainless steel.
The 320i is very adaptable and the mechanical cable grip suits a wide range of cable sizes ranging from 7.5mm to 16.5mm. A dust seal is also included to protect the wiring chamber.