Just sharing my latest knowledge. It may be a little dated due to the passage of time, but I found it interesting and thought I’d share -
I ordered two p/n C36606 from XKS Unlimited (now Moss Motors) back in September 2020. They’ve been on back order since then, but I received them last week. These were the ones advertised by XKS as having upgraded stainless steel float assemblies.
The units I received from Moss were a new design I haven’t seen before, and not like the ones I’d originally ordered from XKS. I called them today and made them aware. According to their rep, the vendor and part numbers have not changed, so they’re looking into it. The float assembly is not metal. It is a slightly cone-shaped plastic tube that’s open at the bottom end, and closed at the top. The nipple at the bottom of the bottle is reinforced with a metal tube, and the inside does have a mesh filter - it’s really short compared to the stock one, to not interfere with the plastic float tube, I suspect. The plastic nipple is tapered with a slight raised area for the hose. The bottle has “FLUID LEVEL” lettering on all four sides (hard to see in any of my pictures, but it’s there), like the one I removed from my car.
While I was waiting for the Moss units to come off back order, I ordered two p/n C36606 from SNG in December 2020. These were the original style bottles and float/sender assemblies. These were received shortly after ordering as they weren’t on back order. The nipple at the bottom of these is reinforced with a metal tube too, but the inside does not have a mesh filter. The plastic of the nipple is tapered with a more generous raise in it for hose sealing. The bottle has “FLUID LEVEL” lettering on two sides only. The overall shape of the SNG bottle is a closer match to what I removed from my car, which I believe is OEM.
All of the bottles seemed sturdy and we’re not suffering from the thin-and-breakable bottles, from years ago, that I’ve read about in the archives. The float tube style may work fine - I don’t know, I didn’t test them, but I’m planning to keep the OEM-style I received back in December.