Limit on Characteristics and its values

Experts,

A few questions related to characteristics

1) Is there a limit on number of charactrestics per class?

2) What is the maximum no. of values (CT04) allowed per characteristics?

3) If multiple values could be assigned per characteristic for a material in material master (check box instead of radio button), is there a limit on no. of values assigned?

Any help is appreciated. Thanks.

UV