You can use the coupon to save $1 on a respirators and other essentials, like goggles, goggleshats, face masks, mask holders and gloves, according to Harbor Freighters.
The coupon is valid from Tuesday 26 November until Sunday 2 December.
To use the discount code, simply click on the link and enter your address to see the latest prices and coupon code.
Harbor Freighings has a number of different discounts on the essentials for sale at its stores, ranging from $2 to $25.
These discounts apply to the regular range of goods.
For more information on the Harbor freight coupons, click here.
Read more about respiratory gear: The Health Department has launched an investigation into the use of the Harbor freight coupon, which was last used on 22 February, according the department.
The department says it is aware of the situation and has launched a review of the code to determine if there is a risk of a similar issue occurring in the future.
More to come.