The RectaTeccta 2.0 is designed to completly encase the series 21 fitting. 
Made of a soft plastic, it will stand up to being dragged along the ground around houses, on driveways and maybe once down the road out the bottom of the van. 
The RectaTecta 2.0 comes complete with both a male and female series 21 fitting.
 
Over recent years we have found a substantial decline in the quality of series 21 fittings and belive this to be due to inferior copies being made worldwide.
At this time the RectaTecta 2.0 and the female series 21 are all made in the UK, The male series 21 is unknown at presant, however in the coming months will be replaced with a Uk made version.