query for getting row from table

[eluser]talwinder[/eluser]
Hi, Currently i am working on a site. I have a table named product in the database. In table there is about 20 rows means 20 products with id's 1-20. From that table i just want to select only 3 rows. E.g I want to select row which have id of 1, 6 and 15. I am juggling with it and unable to get right query. PLEASE HELP!!!