Amazon takes an extra 20% off a selection of 3M Filtrete Healthy Living Air Filter 6-Packs. (Click on any of the options to select a different size. Discount applies in cart.) Shipping fee may vary depending on your purchase quantity or free shipping to Singapore with US$125 or above. Deal ends May 14
- Extra 20% off (Discount applied at checkout.)
- FREE International Shipping to Singapore on orders over US$125.
New to Amazon and have NO idea how to qualify for free shipping to Singapore?