Product size: The inner diameter of the product is 21mm, the maximum outer diameter is 45mm, and the height is 14mm. Manual measurements, please allow slight errors | Compatibility: This product is compatible with Nikon D2, D3, D4, D700, D800, F6 SLR, Df, D4, D3, D3s, D3x, D700, D800, D810, F6, F5, F4, F3HP | Installation method: This product is installed between the camera viewfinder and the camera's built-in eyepiece DK-17. First, unscrew the camera's built-in DK-17 circular eyepiece, and then connect the DK-19 and DK-17 to the camera viewfinder in turn. | Product function: This product can minimize the amount of stray light entering the viewfinder and reduce contrast, making viewing more comfortable, which is especially useful for photographers wearing glasses | Product list:Product include a total of 2pcs DK-19 Eyecup, which can completely meet your daily use needs and replacement.

The ball head can rotate 360° horizontally for panoramic shooting, and is compatible with various camera interfaces, allowing you to easily adjust the angle and achieve multi-angle shooting. | 17mm ball head to 1/4 universal screw/thread, can be used to connect tripod, magnetic suction cup and other suitable adapters. | Made of stable and durable aluminum alloy material, strong and shockproof, no burrs, and the black appearance looks stylish. | It is suitable for motorcycles, scooters, motorcar, pull car, phone holder, camera holder, recorder holder and other DIY use. | It is easy to operate, install and assemble simply, screw it on and use it.

Adaptability: Screw set bottom case cover screws Compatible with MacBook Air Retina 13" 2018 2019 2020, A1932 A2179 A2337. | The hard drive screws are anti-slip and will not slip out while fitting even with force. | Easy Installation and fit for your repair job. Perfect for various settings such as home, office, and school, these screws are essential for replacing or repairing the bottom case of your laptop. | Material:This screw set is made of steel, anti-rust, corrosion-resistant, durable. | Package includes 20pcs M2 Laptop Bottom Case Cover Screws.