LEGO Transparent Neon Reddish Orange Double Ball Joint with Ball Socket (90609)

LEGO Transparent Neon Reddish Orange Double Ball Joint with Ball Socket has been used in at least 5 LEGO sets over the past 10 years, since it was first used in 2014. You can also find this part in at least 11 other colors. It has a design ID of 90609 which can usually be found molded into the bottom of the part.