This product is made of fine quality 304 stainless steel material, can provide maximum corrosion resistance in the harshest conditions. Features: Made of stainless steel material, provide strength. Offers perfect corrosion resistance in kinds of environments. Fixing component, industrial and construction fasteners. Perfect for use in confined areas where the-heads needs to be flush or below the surface. Wide compatibility, can be used in the home and office appliance, communication equipment, ship assembly and other machinery industry. Specifications: Item type: Tapping Screw Material: Stainless steel Quantity: 5PCS Selection type: 3.5mm8mm, 3.5mm10mm, 3.5mm13mm, 3.5mm16mm, 3.5mm20mm, 3.5mm25mm, 3.5mm30mm, 3.5mm32mm, 3.5mm35mm, 3.5mm50mm, 3.5mm60mm(optional) Package weight: 3.5mm8mm: 2.5g/0.08ounces 3.5mm10mm: 3.1g/0.1ounces 3.5mm13mm: 4.5g/0.15ounces 3.5mm16mm: 5g/0.17ounces 3.5mm20mm: 5.5g/0.19ounces 3.5mm25mm: 6.5g/0.22ounces 3.5mm30mm: 7.5g/0.26ounces 3.5mm*32mm: