1、Made of aluminum alloy and plastic material, solid and durable to use. 2、Ergonomic design, easy and comfortable to operate. 3、There is standard interface with diameter of 10mm/0.39in and it is also equipped with one 14mm/0.55in and one 16mm/ 0.63in interface. Threaded interface is easy to install and remove. 4、Good waterproof performance with an vacuum alarm provides perfect protection for the photographic equipment. (Waterproof housing is not included) 5、Lightweight and portable. Ideal tool for underwater photography lovers. Features: 1. Made of aluminum alloy and plastic material, solid and durable to use. 2. Ergonomic design, easy and comfortable to operate. 3. There is standard interface with diameter of 10mm/0.39in and it is also equipped with one 14mm/0.55in and one 16mm/ 0.63in interface. Threaded interface is easy to install and remove. 4. Good waterproof performance with an vacuum alarm provides perfect protection for the photographic equipment. (Waterproof housing is not included) 5. Lightweight and portable. Ideal tool for underwater photography lovers. Specification: Material: Aluminium Alloy+Plastic Color: As picture shown Size: VP-100 Vacuum Pump Handle: Approx. 60*29.4*128mm/2.23*1.16*5.04in VPS-100 Vacuum Alarm: Approx. 30.8*29.7*35mm/1.21*1.17*1.38in 14 Interface: Approx. 29*29*20mm/1.14*1.14*0.79in 16 Interface: Approx. 29*29*20mm/1.14*1.14*0.79in Screwdriver: Approx. Dia. 3.0mm/0.12in Waterproof Ring A: Approx. 20*1.5mm/0.79*0.06in Waterproof Ring B: Approx. 19*2mm/0.75*0.08in Packing List: 1 * VP-100 Vacuum Pump Handle 1 * VPS-100 Vacuum Alarm 1 * 14mm Interface 1 * 16mm Interface 1 * Screwdriver 1 * Waterproof Ring A 1 * Waterproof Ring B 1 * Manual