High-concerned chemical: None Model Number: Steel Nai Type: Common Nail DIY Supplies: Woodworking Material: Steel Origin: Mainland China Certification: None Material: Steel Surface: Galvanized Dimensions: 25mm; 50mm Applicable: Cement walls, furniture maintenance, woodworking, red brick walls, etc Features: High strength and hardness, sturdy and reliable, widely applicable, easy to install Quantity: 25mm (220 pieces per box); 50mm (78 pieces per box)