In the Magic Nevin Magic Shop you will find a wide range of Invisible Threads, thread reels, waxes & instructional material.
Magicians invisible thread is mainly used in small item 'levitations' and is normally black in colour. It is very fine so is virtually 'invisible' when used correctly.
Invisible thread is available either stripped or unstripped. Stripped invisible thread is a single strand ready for use. Unstripped invisible thread is supplied in a strand of many filaments (often 100 or more strands) from which a single strand has to be extracted before use.
Standard Invisible Thread is only slightly stretchy. Elastic Invisible Thread is much more stretchy. Which one you use comes mainly to preference with most magicians preferring standard thread for levitations like the floating bill trick.
There is also a clear elastic invisible thread. This is normally used for some versions of the haunted deck trick and is not really suitable for levitations as it is too thick & may caytch the light.