Door Hangers are flyers that have a 1.25" diameter circle cut out with an accompanying slit that allows them to hang on a doorknob. They are very common in guerilla marketing campaigns, as they nearly guarantee customer interaction.

UV 1 Side Coating
UV is short for Ultra Violet Light-Cured Coating. This is a high-gloss coating applied over the front of the printed piece. It is not recommended for printed material you need to write on after being produced.
UV 2 Sides Coating
UV is short for Ultra Violet Light-Cured Coating. This is a high-gloss coating applied over the entire front and back of the printed piece. It is not recommended for products you need to write on after being printed.
AQ 2 Sides Coating
AQ is short for Aqueous Coating. This is a semi-gloss, environmentally friendly, water-based coating applied over the entire front and back of the printed piece. It provides additional gloss and protection, and it can be written on with a ballpoint pen.
Satin AQ Coating
AQ is short for Aqueous Coating. This is a matte finish, environmentally friendly, water-based coating applied over the entire printed piece. It reduces the gloss of the printing and it can be written on with a ballpoint pen.

4/0 (Full Color Front Side Only)
100# Gloss Text : AQ2 or UV2
14 Pt. Gloss Cover stock : UV1 or AQ2
16 Pt. Gloss Cover stock : UV1 or Matte
100# Gloss Cover : AQ2
4/1 (Full Color Front / B&W Back)
100# Gloss Text : AQ2 or UV2
14 Pt. Gloss Cover stock : UV1, UV2 or AQ2
16 Pt. Gloss Cover stock : UV1, UV2 or Matte
100# Gloss Cover : AQ2
4/4 (Full Color Both Sides)
100# Gloss Text : AQ2 or UV2
14 Pt. Gloss Cover stock : UV1, UV2 or AQ2
16 Pt. Gloss Cover stock : UV1, UV2 or Matte
100# Gloss Cover : AQ2

Recommendations

The most common order options are 4.25" x 11" on 14 Pt Gloss Cover stock. Almost always, Door Hangers are printed in full color on both sides (4/4).
Turnaround 5-7 Business Days

Marketing Tips

Door Hangers are used to spread a consistent message or campaign through a desired area. They are commonly used for restaurant delivery menus, advertising services and products, or political campaigns. It's hard for people to miss a hanger on the door when they come home, so this is a high-visibility marketing solution. Door Hangers often include discounts, coupons, or special offers.