The "DT Tubeless Tape 10m Roll 19mm Wide" appears to be a product related to tubeless bicycle tires. Tubeless tape is used to seal the rims of tubeless-ready bicycle wheels, preventing air from escaping and allowing the rider to run the tires without inner tubes. Here's some information about this product:

1. Brand: The "DT" in the product name might refer to DT Swiss, a well-known manufacturer of bicycle components, including rims and wheels. DT Swiss is known for producing high-quality bicycle products.

2. Tubeless Tape: Tubeless tape is a special adhesive tape designed to cover the spoke holes and seal the rim bed of tubeless-compatible bicycle wheels. This tape creates an airtight seal, allowing the tire to hold air without the need for an inner tube.

3. 10m Roll: This product comes in a roll of 10 meters in length. This roll length should provide enough tape to set up multiple wheels, as you typically need to apply several layers of tape to ensure a secure seal.

4. 19mm Wide: The tape has a width of 19mm. This width is important as it should match the width of the rim bed you are applying it to. The tape needs to fully cover the rim bed to create a proper seal.

Using tubeless tape is a common practice among cyclists who prefer tubeless tire setups. It helps reduce the risk of punctures, allows for lower tire pressures and improved traction, and generally provides a smoother riding experience.

Keep in mind that while the product itself is straightforward, the process of applying tubeless tape can be a bit finicky, and it's important to follow the manufacturer's instructions carefully to ensure a proper seal and a successful tubeless conversion.