General description These 200 pieces of 1.77 inch (45 mm) plastic insulation washers are made from durable polypropylene, providing excellent insulation and a low profile design. They are ideal for fixing and supporting various types of foam boards, including expanded and extruded polystyrene sheets. Technical specifications Diameter: 45 mm (1.77 inch) Middle hole diameter: 5 mm Quantity: 200 washers Material: Polypropylene Installation Easy to install with screws or nails Can be easily removed when necessary Usage Designed for fixing and supporting foam board insulation Suitable for use in various repair applications Other information Color: White Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product. Measurement allowed error: +/- 1-3 cm