Based on the search results, "Sanda Holder" refers to a brand of cigarette holders and filters. "Sanda" is a well-known brand, particularly in the smoking accessories market, that specializes in products designed to reduce the intake of tar and other harmful substances from cigarettes.

Here's a breakdown of what a Sanda holder typically is:

Function: It is a small accessory that a cigarette is inserted into. It contains a filter, which can be either disposable or reusable, to trap and filter out a significant portion of the tar and nicotine from the smoke before it reaches the smoker's lungs.

Types: There are two main types of Sanda holders:

Disposable Holders: These are meant for one-time or limited use (e.g., for 5-10 cigarettes), after which the entire mouthpiece is thrown away.

Reusable Holders: These have a more durable body and a replaceable or cleanable filter core. They are more economical in the long run.

Filtration Technology: Sanda often uses multi-stage filtration systems, such as "triple magnet," micropore, or activated carbon filters, to effectively reduce tar.

Materials: They are commonly made from food-grade plastic, resin, or sometimes have a metal or wooden body for a more premium feel.

Benefits:

Tar Reduction: The primary benefit is the reduction of tar and other harmful particles.

Nicotine Reduction: They also help to reduce nicotine intake.

Cleaner Smoking: By holding the cigarette, they can help prevent yellowing of fingers and reduce the smell of smoke on hands.

Cooler Smoke: Some models are designed to cool the smoke, making the experience smoother.