Currently vault does not support wildcards when searching numeric values. In order to search a range, you must set up multiple conditions of >= or <=.
Please incorporate wildcards for Numeric property searches. For example
Outside Diameter between 100 an 200 could be 100 - 200
Or even set an additional operator in list of "above, below, >, < etc" that says "Range" or "Between" then allow for multiple values to be entered.