T-530, T-545, T-555, T-575 Header Moulding SizeT-530 1″ x 3-1/2″ x 16′ T-545 1″ x 4-1/2″ x 16′ T-555 1″ x 5-1/2″ x 16′ T-575 1″ x 7-1/4″ x 16′ Material UL