FB-1 Mullion Filler Block


Design Hardware
Contact a sales representative for contractor and bulk pricing.


  • Base Material: Aluminum
  • 2″ x 1 1/2″ x 5/8″
  • Optional accessory for use with the KRM Mullions when frame stop is too narrow to mount mullion top retainer. Provides the extra surface needed to properly install mullion.
  • Machine screws, Self tapping machine screws & Wood screws
  • AL Painted (prime coat)
  • Limited Lifetime Warranty