The 877-307 Aftermarket Head Cap/Gasket Set is a replacement part designed to be compatible with Hitachi NR83A and NR83A2 framing nailers. This set includes a power tool component and is made in China. The product dimensions are 3 x 3 x 1 inches, and it weighs 2.08 ounces. This product is essential for maintaining the functionality of your pneumatic nailer in a professional setting.