Sturdy metal construction. Replace at least once per season. Replacement furnace water pad fits Aprilaire 350, 360, 560, 560A, 568, 600, 700, 760, 760A, 768 (35), Honeywell HE200A, HE250A, HE260 A/B, HE265A/B, ME360, HE360A/B, HE365A/B, Lennox WB2-17, WB2-17A, WP2-18,WP2-18A.
Unit: EA