I have a Little Giant pump, but I don't have the model number handy. It's the equivalent of the March pump. Mine has a Ryton (or whatever), plastic pump head. Don't let the temperature ratings stop you from buying any particular pump. The temp ratings relate to the strength of the pump housing under line pressure in a closed system. IOW, the plastic loses strength when it gets really hot, but we home brewers seldom see anything more than a few PSI, so the temp rating is not really relevant. Anything that will handle 150 deg will be OK at anything we can throw at it. IMO, the Little Giant Pumps are of slightly higher quality than the March pumps, but it's very close. My pump is supposed to be able to run dry for up to 8 hours without damage. That's reassuring, although I would certainly never do that unless by accident somehow. It speaks for the integrity of the design I think.