Hello Edropian,
Our Black Sparkle 1/2 3/4 compression fittings fit for ID1/2” OD3/4” Wall 1/8" soft tube. We are not sure whether it fits for (EK ZMT 1/2 3/4) tube or not, but if the size is correct, it should fit. Also, we have the soft tube BP-PVCT1234CL-2M too.
https://shop.bitspower.com/index.php?route=product/product&product_id=2897&search=1234