High-quality polypropylene insulation washers designed for foam board and polystyrene sheet installations. These 45mm (1.77") plastic washers feature durable construction with 5mm center holes, ideal for load distribution in insulation projects. Package contains 200 pieces of white plastic washers - sufficient quantity for professional contractors and DIY home repairs. Specially engineered to prevent thermal bridging in extruded polystyrene (XPS) and expanded polystyrene (EPS) applications. Low-profile design ensures minimal surface protrusion while maintaining screw/nail stability in various insulation materials. Universal compatibility with standard fasteners and easy installation/removal process for repeated use. Color: White Material: Polypropylene Package Contents: 200 x Plastic Insulation Washers