Example words with ɛ: + difference between ɛ: and ɛ [closed]

I've just started studying phonetics and phonology of English and I'm currently trying to find words with the vowel ɛ: as examples for a homework. Also, is there a difference between ɛ: and ɛ, as in, does the "colon" make a difference? Because in my textbook I can only find this symbol without the "colon"

Solution 1:

The vowel sound in English words such as "bed" and "dress" is usually denoted ɛ, not e.[1] You might get [ɛ:] in a non-rhotic accent where "air" is pronounced not as a diphthong but as the same [ɛ] vowel, lengthened. In such an accent, "shed" and "shared" would be pronounced exactly the same except for the length of the vowel.

[1] However, this phoneme is pronounced differently in different accents, and [e] might be a fair representation of it in some accents where it is pronounced higher, e.g. New Zealand English.

Solution 2:

examples?
I looked a bit in the Oxford English Dictionary (subscription requuired). There is this pronunciation:

hair Brit. /hɛː/, U.S. /hɛ(ə)r/

In the non-rhotic British pronunciation, the sound /ɛ/ is lengthened to /ɛː/ as the only result of the letter R in there.