Black Diamond manufactured these for us but now these are the last in production. When gone the're gone with only 6 left in stock. 
Great quality and never had an issue in over 15 years of manufacture.
Silicone lead and quality moulded plug boot.
These are the longer VVC ones I also have the MPi ones available too.
Note the earlier VVC cars had 4 long plug leads these were changed to a two plug lead from approx 2001 I have only 2 sets of the early leads left.