JSN-SR04T Transducer Dimensions

I have to wait 3-5 weeks for my waterproof JSN-SR04T sensors to arrive, and in the meantime I want to prep some customized enclosures for them. However, I can't find the dimensions of the transducer anywhere.

So I was just wondering if anyone else has this particular sensor, and is willing to do some measurements of it.

Here's the dimensions I need:
A - the diameter of the top part of the transducer
B - the depth of the bottom part of the transducer
C - the diameter of the bottom part of the trasnducer

(top/bottom - if you look closely, you can see the transducer is a tad bit wider at the top. So I want to drill a hole on an enclosure that is slightly smaller than this, so the transducer will stay nicely in place)

EDIT: After searching a lot, I found that diameter A is 25mm. However, B and C still remain a mystery to me