as far as the elements are concerned @ 1.5kw and in a similar shape/size to 2.2kw and 2.4kw elements fitted in (non budget) kettles, they are perhaps a cheap LWD option

I brewed at least 16 times with em before passing on the brewery and building bigger and shiny, and they brewed a few more brews with thier net owner before i lost track..
I would recommend them. fyi i powered 2 x (3kw) via a single 13a socket via a pid/ssr combo..
Mine arrived with a gasket and screws suitable for fitting in a thin metal skin pot/kettle. in order to use with my thicker walled plastic bucket i used a razor to remove the thickest face from the gasket and used what i had left to sit the gasket in the hole and used the thinner face on the bucket inside to seal, I may have also needed to get 2 x longer screws, but if you do that be careful as if u use too long a screw you can push into the electrical contacts or insulation when tightening up.. i think i shaved the gasket rather than hacksaw and file longer screws but it was a while back..
the plastic shroud is a simple cheap shell with no substance or power cord gripping capacity leaving that to the friction fit on the terminals of the sprung connectors but what more do you need, its splash proof and more importantly finger proof. Just check leads are rated suitably as said above and pushed well home, and If you need to adjust the pots position ( bring valve to shelf end for example) double check the leads remain fully plugged in..