Hello Keith,
From the picture of the whole case in below website, the length of our radiator is 398mm, it is compatible with the BPTA-WDPO11DE or BPTA-WDPO11DA.
Dimension (LxWxH) : 398x120x29.6 mm of BP-NLSF360-F4PB.
https://shop.bitspower.com/index.php?route=product/product&product_id=7134&search=O11D