SIZE: The plastic washers are 45mm/1.77 inches in diameter and the center hole is 5mm; you will get 500 plastic insulation washers, enough for your daily replacement and use for foam board insulation and other repairs.Quality Material - These insulation washers are made of polypropylene , which feature good insulation performance, strong bearing capacity, strong durability.Function -These plastic washers are used for fixing and securing insulation materials onto wall, floor, ceiling, ventilation ducts etc.The washer is good for load spreading and load distribution, it can prevent damage to insulation foam panels or sheets during installation.
eBay