Product to order to adapt the new retrospec electric pump to your old generation 2016-2020 Ten Toes or Retrospec board.
(You will just need the thinnest black ring. It will need to be put on the pipe of the electric pump)
The H3 adjustable SUP pump adapter is compatible with a variety of stand up paddle boards. There are three colored rings on the adapter that allow it to fit a variety of H3 valve depths. The black ring is rubbery and provides a good pressure/friction fit while the yellow and green rings are plastic and can be removed to adjust the valve depth to suit. Inside the middle of the adapter there is also a screw which has an adjustable height.