Please select the correct variant for the controller before placing the order. 
To check which variant is the right variant to replace your Fatfish OG's controller, look at the label on your controller and match the product number to the variant no. 

If your controller's label has the product no. LSW1729-19E, choose this variant. 
If your controller's label has the product no. LSW1729-21E, choose the variant with this code.