14mm x 20mm x 1.5mm Sealing Washers (DIN 7603) - Fibre Fibre Sealing Washers compress well under pressure, as well as expanding slightly when exposed to water. Due to this, they are often used within the plumbing industry as the swelling can create a tighter seal. They are ideal replacements for drain plug washers and are suitable for outdoor applications. These sealing washers are manufactured from are made from fibre. For larger quantities or items not listed, please email and one of our team will provide you with a quotation. 14mm x 20mm x 1.5mm Sealing Washers - Fibre