M-D Building 43822 Adjustable Thermal Threshold, 36" BackToSchool Ov classification means that the

Ov classification means that the cartridge is approved for organic vapors

Easy to install with fewer connections

Aluminum construction with anodized finish

and does not require any scrubbing

Automatic change reminders have also been included and will readily alert owners whenever filters or batteries require replacement

M-D Building 43822 Adjustable Thermal Threshold, 36" BackToSchool Ov classification means that theSet screws allow for adjustment to seal uneven gaps between bottom of door and floor for a weathertight seal. "Thermal Break" design prevents frost build up on interior surface of threshold. 1 3 8" to 1 5 8" Height. Highlights: Aluminum adjustable height 1 3 8" to 1 5 8" height W x l 4 9 16" x 36" Finish : aluminum WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth