It looks like this Part has been superseded by LEGO Part 13731 Slope Curved 10 x 1 [Symmetric Inside Ridges].
Click on a colored part below to see the Sets and MOCs that use part 85970 Slope Curved 10 x 1 [Asymmetric Inside Ridges] in that color. You can find an overview of all LEGO Colors here.
If a color is missing, it probably needs to be added to a Set Inventory.
This part has been used by MOCs in the following colors but not officially released.