ITEM NAME:Lovoski Battery Back Cover Door Lid Replacement Part For D3100 DSLR Description: Battery door cover lid protector. Suitable for Nikon D3100 digital cameras. Better dustproof protection for camera batteries. Perfect replacement for damaged part. High quality plastic & metal material for durability. Specification: Materialï ¼Å¡Plastic Sizeï ¼Å¡40×22 mm/1.5×0.8 inch Package Includes: 1 Piece Battery Cover SKU: CKX0015602977006467.Battery door cover lid protector. 1 Piece Battery Cover.