A valve is a mechanism or natural thing that opens, closes, or partially obstructs numerous passages to regulate, direct, or control the flow of a fluid (gases, liquids, fluidized solids, or slurries). Although valves are technically fittings, they are normally considered a separate category. Fluid moves from higher pressure to lower pressure through an open valve.

A vaginal speculum is a gynecological tool that is used by a gynecologist to dilate the vaginal opening for inspecting the cervix, the lower part of the uterus. The tool helps the gynecologist in assessing the health of the reproductive system of the patient and checking for diseases, such as cervical cancer. The tool is made from materials such as plastic and chrome-plated stainless steel.

Uterine fibroid (UF) treatment devices are medical tools designed to manage and treat UFs, which are non￾cancerous growths in the uterus. These devices include ultrasound transducers for imaging, radiofrequency ablation tools that use heat to destroy fibroids, and uterine artery embolization (UAE) catheters that block blood flow to fibroids, causing them to shrink. Additionally, focused ultrasound devices use high-energy sound waves to target and eliminate fibroids. These treatments aim to reduce symptoms such as heavy menstrual bleeding, pelvic pain, and pressure on surrounding organs.

USB type-C, commonly referred to as USB-C, is a 24-pin reversible connector designed to transmit data, video, audio, and power. It supersedes previous USB connectors, offering a versatile and universal interface for connecting various devices such as monitors, external drives, hubs, docking stations, mobile phones, and more. USB-C supports multiple protocols, including Thunderbolt, Peripheral Component Interconnect Express (PCIe), High-Definition Multimedia Interface (HDMI), and DisplayPort, and can deliver power up to several hundred watts through USB Power Delivery. Its reversible design allows for easy connection without worrying about plug orientation.

Urology devices are medical devices that are used for the treatment of human urinary tract systems and male reproductive organ disorders. The urology devices include dialysis systems and dialysis catheters, ureteroscopes, resectoscopes, ureteral stents, lithotripsy devices, laser fibers, stone retrieval devices, radiofrequency ablation devices, meshes, ureteral access sheaths, balloons, and urinary catheters.

Travel bags are used to carry clothes and other personal accessories during trips. Business bags are used by people to carry official belongings such as laptops, files, and other office essentials. Travel and business bags include duffel bags, backpacks (rucksacks), business bags (briefcases, laptop bags, and others), suitcases, and trolley bags. These bags are made of raw materials such as leather, plastic, expensive fabrics, and metal.

Transcranial doppler is a non-invasive diagnostic procedure that monitors and assesses the blood flow through the brain blood vessels by recording ultrasound waves moving through the cranium.

A transparent quartz tube is a cylindrical tube made from high-purity quartz glass, known for its excellent optical clarity, high thermal resistance, and chemical stability, commonly used in applications requiring high transparency and durability.

Towing equipment consists of tools and accessories mounted on a vehicle to attach a camper, trailer, etc. Fifth wheels, hitches, gooseneck hitches, wire harnesses for drawbars, weight distribution systems, crossbars, tow slings, tow dollies, ball mounts, and tow bars are examples of towing equipment. Chains, straps, hitch locks, hitch covers, hitch aligners, and hitch adapters, as well as fifth-wheel hitch adapters and anti-rattles, are examples of towing equipment. Towing equipment refers to the devices and accessories used to attach a belt or crawler to the vehicle.

Toys and games are used for the amusement and entertainment of children. Activity toys such as building sets, dolls, puzzles such as jigsaw puzzles, and card games help children enhance their mental agility and develop coordination and manual skills.