Electronic Keyboard Sustain Pedal Question?

I have a Casio electronic keyboard. I’m not sure which model and stuff it is, all i know about it is that it is a Casio. (I’m not at home with my keyboard when i am writing this question that is why I don’t know). But I want to have my keyboard sound more like a piano. Like you know with the oedals and stuff. Which pedal on amazon that is less than 20.00 (not including shipping) will work for my keyboard?