FTBH10 - 1” (25) Slot Width
FTBH15 - 1½” (38) Slot Width
FTBH20 - 2” (51) Slot Width
FTBH25 - 2½” (64) Slot Width
FTBH30 - 3” (76) Slot Width
FTBHI10 - Insulated • 1” (25) Slot Width
FTBHI15 - Insulated • 1½” (38) Slot Width
FTBHI20 - Insulated • 2” (51) Slot Width
FTBHI25 - Insulated • 2½” (64) Slot Width
FTBHI30 - Insulated • 3” (76) Slot Width
FTBHR10 - Return • 1” (25) Slot Width
FTBHR15 - Return • 1½” (38) Slot Width
FTBHR20 - Return • 2” (51) Slot Width
FTBHR25 - Return • 2½” (64) Slot Width
FTBHR30 - Return • 3” (76) Slot Width