BF3: 3" TTMA Aluminium Flange.
BF3-1: 3" TTMA Mild Steel Flange.
BF3-1S: 3" TTMA Stainless Steel Grade 304 Flange.
BF3-1S-316: 3" TTMA Stainless Steel Grade 316 Flange.
BF4: 4" TTMA Aluminium Flange.
BF4-1: 4" TTMA Mild Steel Flange.
BF4-1S: 4" TTMA Stainless Steel Grade 304 Flange.
BF4-1S-316: 4" TTMA Stainless Steel Grade 316 Flange.