How do I remove numbers/scales from sliders?

I need to remove all scales/numbers from a slider. This is for a common medical research screening tool called a "Visual Analogue Scale". The idea is people give a vague indication of a response rather than a numeric rating like 8/10 - see attached image.

It doesn't matter if I use a 1. Numeric Slider, 2. Range Slider or 3. Fancy Range Slider to accomplish this. 

I have found this thread where it suggests it is possible to remove values from sliders:
https://www.jotform.com/answers/268437-Is-it-possible-to-remove-the-value-of-an-input-slider-from-a-form

However, when I try and apply the CSS to any of the three options it does not remove the numbers.

Can someone please help?

Best regards,

Tom

It looks like you have already found a solution with the Numeric Slider widget and the custom CSS added to the widget:

.bfh-slider-value {
display: none;
}

Hi Mike, thanks for looking for me. Yes I just found it!