Guitar Slides

Some players prefer a heavier slide which are easier to play and make contact with the strings better for fingers that aren't expert guitar fingers. Glass tends to be heavier. Glass offers good sustain, is smooth and has less string squeak than chrome or porcelain. Generally a more mellow sound.

Chrome slides give a bright sound and harmonics tend to ring better.

Porcelain is also smooth, light and mellow sounding.
Some players prefer a heavier slide which are easier to play and make contact with the strings better for fingers that aren't expert guitar fingers. Glass tends to be heavier. Glass offers good sustain, is smooth and has less string squeak than chrome or porcelain. Generally a more mellow sound.

Chrome slides give a bright sound and harmonics tend to ring better.

Porcelain is also smooth, light and mellow sounding.