1 1/2 inch NPT x Close length TBE 316 Stainless Steel Schedule 80S

1 1/2 inch NPT x Close inch length Pipe Nipple, Threaded Both Ends, Seamless Schedule 80S 304 Stainless steel pipe.

1 1/2 inch NPT x Close length Pipe Nipple, Threaded Both Ends, Welded Schedule 80 black pipe (carbon steel).

1 1/2 inch NPT x Close inch length Pipe Nipple, Threaded Both Ends, Welded Schedule 40 316 Stainless Steel pipe.