https://sb2019.samweber.biz/story.php?title=human-hair-wigsu-tip-extensions-69948-%7C-play-associates 1) no, but super, highly recommended to protect your glass piece and keep clean. 2) the joint will be labeled with the end type and size, for example: 18mm male to male connector (both ends male and both 18mm) or 14mm female to 18mm male. Sun, 08 Sep 2019 22:01:39 UTC en