1) 3/8 in size
2) Stainless steel 304 and steel both available

Hanger hardware kits, include one piece threaded rod, two pieces each for nuts, flat washers and spring washers, we are able to supply 3/8 in x 4 in, 3/8 in x 6 in, 3/8 in x 8 in and 3/8 in x 10 in.