2-PLY WOOL HVAC Ring Panel Filter 19" x 20" or 24" x 20" BOX OF 20 PIECES. Please choose your size and add a note at checkout, or send us a message immediately before/after purchase. Free shipping to main UK zones. Islands and Highlands may incur additional charges. All international locations will incur additional charges. Please contact the team at SSUK.ONE with your address BEFORE purchase for an accurate quotation.