i ordered mine from here https://www.sa4x4.co.za/product/safari-snorkel/
it allows the top half of the snorkel neck to swivel when im wading through deep water.
The cheaper ones were just rubbish.
Then i flip it around when driving on normal gravel and roads. Very inexpensive but a good piece of overlanding kit!!
im not sure what the benefits of having a stainless steel snorkel are? other than getting red hot after 12 hours of kgalahadi sunshine. LOL