M-D Building 43822 Adjustable Thermal Threshold, 36" Bed Casters Semi-pneumatic rubber tires

Semi-pneumatic rubber tires

Certified factory fire protection at temperatures up to 1200°F for 30 minutes

Anchor down shanks hold tight and do not grind washers when driven home

Finish: Frosted

M-D Building 43822 Adjustable Thermal Threshold, 36" Bed Casters Semi-pneumatic rubber tiresSet 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