Description Ideal for both indoor and outdoor projects, this set of 100 pcs white plastic washers is designed to enhance the fastening and insulation of foam and insulation boards. Their durable construction and round shape make them perfect for ceiling and wall applications, ensuring a secure and long-lasting installation.-insulation board washers Features -Color:White -Material:Plastic - Size: 4.50X4.50X0.50cm/1.77X1.77X0.20in - Round shaped, hole design, insulated -round washersboard washers are easy to install, simple to use, save your time and efforts. - Delicate workmanship, reasonable design, classic color, simple structure, plastic round washers are convenient and practical to use, with sufficient quantity, easily meet your needs.-insulated board plastic washers insulation plastic washers-Round shape, with hole design, foam board washers are simple to install, easy to use, convenient and practical-round spacer washer backer board fixing washers-Compact and small size, portable and lightweight, plastic washers are simple to store and use, suitable for indoor, outdoor use-plastic washer spacer washer-Round Design Provides Uniform Pressure Distribution For Secure Fastening On Insulation Boards-tile backer board washers washer board washers-Round Shape Provides Uniform Pressure Distribution For Secure Fastening On Foam Boards-board washers insulating board washers-Round Plastic Spacers Ideal For Ceiling Fixing And Wall Padding Projects Offering Durability And Convenience-plastic insulation washers