Hello Tim,
The thermal pads thicknesses of the BP-WBV1080ZAMP-H-BRGB water block are 1.0mm and 2.5mm, as following links.
BP-WBTP-F *5 pcs
https://shop.bitspower.com/index.php?route=product/product&path=67_15&product_id=4071
BP-WBTP-E *4 pcs
https://shop.bitspower.com/index.php?route=product/product&path=67_15&product_id=4070