Material # Weight, kg (lbs) Pack Zinc plated 11 491 65 0.28 (0.62) 6 Hot Dip Galvanized 11 492 65 0.29 (0.64) 6 Stainless/Acid proof 11 493 65 0.28 (0.62) 6 Joining fitting to join Extension B19 to another B19. Can also be used as extension to Ceiling fitting B23.