1、CNC machined from light weight aircraft-grade aluminum, sealing it against corrosion and abrasion. 2、Standard dual dovetail design, with high contrast built-in bubble level to improve alignment 3、Suitable for many traditional SLR cameras and digital SLR cameras macro photography 4、Accurately find nodal point for panoramic photography, which can realize the maximization of seamless stitching of panoramic photography. 5、Standard AS interface, compatible with ARCA-SWISS, RRS, MARKINS, KIRK, etc. Features: CNC machined from light weight aircraft-grade aluminum, sealing it against corrosion and abrasion. Standard dual dovetail design, with high contrast built-in bubble level to improve alignment Suitable for many traditional SLR cameras and digital SLR cameras macro photography Accurately find nodal point for panoramic photography, which can realize the maximization of seamless stitching of panoramic photography. Standard AS interface, compatible with ARCA-SWISS, RRS, MARKINS, KIRK, etc. Specification: Color: black Material: aluminum alloy Model: FNR-200 200mm Mounting screw: 1/4inch Dimensions: Approx. 23.1* 3.9* 1.9cm/ 9.1* 1.5* 0.7in Weight: Approx. 214g Package List:  1 x FNR-200 Plate clamp 1 x Spanner