The majority of the disposable virus sampling kit contains essential components that will be adequate for basic applications. They also come with a protective covering to prevent the surface from being contaminated. In some cases, you may not even need to use a sample preservation solution. If your specimen is too small or fragile to fit into the small opening of the syringe, for example, you will not need a sample preservation solution.
Of course, there are many different disposable virus sampling kits available on the market today. If you are looking for something with more functionality than a basic model, you should consider one of the various basic models that include a pen-type applicator, which is used to draw the sample through an irrigation tube onto a glass plate. The basic models will typically provide more than enough sample volume for your needs.