In most cases the reel glass is generic. Some display one pay line others 5 or 9. There are some games that the reel glass is unique like Tabasco, Munsters, etc.
The number of lines is set by the SB chip as is the number of credits. All have to match SB, glass, and strips. This is why it is preferred to purchase a kit. For example triple lucky sevens is available as a 1 line, 5 line, and 9 line the strips are different for each one of them. Most games will use the same strips if it's a 2 or 3 credit game, there the difference is the award glass and the SB chip.
Happy Hunting