Check the listing for details. 80Pcs Perforated Insulation Pins 3.2" with 0.8" Washers Insulation Stick Pins. Condition: New. Listed at 22.98 USD. Insulation pins and washers function as core anchoring parts, suitable for fastening insulation materials in diverse scenarios: HVAC duct insulation, building wall insulation, equipment thermal insulation, and display board installation. They work seamlessly with a wide range of substrates, including fiberglass mats, extruded polystyrene boards, insulation foam boards, and wood panels.SpecificationColor: SilverMaterial: Aluminum, galvanized ironWidth: 24mm / 0.94 inchNail Length: 80mm / 3.2 inchHole Diameter: 1.5mm / 0.06 inchWasher Diameter: 20mm / 0.8 inchPacking List: 80 x Insulation Board Fixing Nails; 80 x WashersAdvantageCrafted with a galvanized iron base washer, paired with aluminum nails, this assembly delivers insulation, improving load-bearing capacity and outstanding durability.