Nominal Size: 20 x 25 x 4, Actual Size: 19 1/2 x 24 1/2 x 3 5/8 (19.5 x 24.5 x 3.63) | Attracts indoor allergens, dust, pollen and other airborne contaminants. | Hypoallergenic and antimicrobial pleated electrostatic filter material | Nordic Pure recommends changing 4" air filters every 3-6 months | Made in the USA!

12x27x4 MERV 11 Pleated Air Filter for AC HVAC or Furnace (Pack of 4 Filters). AFB Gold MERV 11, comparable with MPR 1200 Allergen or Micro Particle MPR800. | MERV 11 SYNTHETIC MEDIA DESIGNED FOR ALLERGEN PROTECTION: Attracts and captures pet dander, lint, dust, pollen, dust mite debris, mold spores, smoke, and smog. | LONG-LASTING: Designed to last up to 3 months. Suitable for residential and business or commercial use (Industrial grade). | MADE IN THE USA: Manufactured by FilterBuy in the USA using 100% American made components. | HIGH QUALITY: Filter frames are made of beverage board, which stays strong through humidity and temperatures up to 200° F. Synthetic media provides significantly higher particulate efficiency than standard cotton media.

【Premium Quality Electrical Adapter】 ETL Listed. JACKYLED 3-2 prong adapter is made of fire-proof material PBT that is high temperature-resistant up to 200℃. With AC 125V/15A and Electrical Rating 1875W Max Wattage, this light socket outlet 3-prong is sturdy enough for working with electrical, household, Industrial, machinery and other appliances. | 【Wall Outlet Converter】The 2 prong to 3 prong outlet adapter can covert a grounded electric extension power cord to an AC outlet without a grounding pin slot, perfect for older houses or offices with AC wall outlets that can not accept grounded plugs. | 【Polarized Plug】The 3-prong to 2-prong grounding adapters is polarized and better than the un-polarized plug adapters, because polarized plugs only allow you insert the plug into the outlet slots in one direction, wide blade to wide slot, narrow blade to narrow slot, which ensures neutral-to-neutral, hot-to-hot and provides a measure of safety for the appliances and house wiring to be aligned in terms of polarity. This also explains why most household appliances’ plugs are polarized. | 【Grounded Protection】This three-prong to two-prong adapter plug fits snugly into the wall outlet without falling out when plugging a heavy cord into the adapter. It has a metal grounding tab/ ground terminal to fit neatly under the outlet plate screw and provide a proper grounding for safety. | 【US to Japan Travel Converter】This 3 prong to 2 prong adapter is also a handy electrical converter for travelling to Japan. All outlets in Japan is 2-prong, so with this light plug adapter, you can easily charge your 3-prong electronic devices, like laptop, tablets, smart phones, electric shaver, speaker, etc.