Unfortunately range slider field type is not available. In our opinion it is not worth to use it because it has bad influence on the website statistic. Please consider that range field has one of the worst UX. Range field will create problem for: old people, people with big fingers, people using old mobile phones with cheap screen. There will be also big ux problem e.g. if the range is 1000 - 100000 to select e.g. 1500-2000 because there is not enough space to easily drag and drop it. We will consider adding this type of the field in the future.