Merv 11 Pleated Air Filter - 18" x 34" x 1" Quantity:12-pack They are constructed from 304

They are constructed from 304 Stainless Steel material formed to exact specifications

Water resistant lamp connection

The "Practical Pleat" contains over 500% greater surface area than a MERV 10 one-inch pleat

the more efficient a filter is at removing particles

the A+2000 uses stage loading

Merv 11 Pleated Air Filter - 18" x 34" x 1" Quantity:12-pack They are constructed from 304Any Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop, and long service life which reduces HVAC equipment maintenance and energy costs. A higher MERV rating means that the air filter that you are about to purchase possesses a higher amount impurity filtration ability than your ordinary filter.