Filter King 21x57.5x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 21 x 57.5 x .75"

Brand: Filter King

Type: Pleated

MERV Rating: 8

Number in Pack: 4

Application: Air Conditioner, Furnace

Item Dimensions: 21″ W x 57.5″ L x 0.75″ D (19.1 mm)

Description

• FILTER: MERV 8 rated, 4 pack Air Conditioner Filter
• Size: 21″ x 57.5″ x 1″
• Actual Size: 21″ x 57.5″ x 0.75″
• Made in USA: Fully manufactured in the United States with high-quality materials and construction (EPA Establishment Number: 103501-FL-1)
• Max Performance: Lasts up to 90 days; recommended replacement every 30–90 days for 1-inch filters to maintain A/C and heater efficiency
• Capture More: Pleated design traps more particles, extends filter life, and maintains airflow — feel the difference within 48 hours
• Fast & Easy Installation: Simple “Open, Slide, and Close” replacement process