Amazing Drapery Hardware 2 QTY: 2&ouml; Low Profile Plastic Universal Tape Drum for Venitian (Horizontal) Blind Repair Low Profile Plastic Universal Tape Drum for Horizontal Blind Repair For use with 2" Horizontal Blinds with a LOW PROFILE headrail. A low profile headrail is 1.5" High x 2.25" Deep. Plastic. Ivory (it is an internal part you will never see). You will receive 2 drums.