Ouroboros & Pentagram 7" Record Inserts

thingiverse

Adapters made specifically to play 7-inch vinyl records spinning at a high speed of 45 revolutions per minute are easily loaded onto a standard-sized 9/32-inch diameter spindle on a phonograph. One design featuring an ancient symbol of eternity, often referred to as a Pentagram, requires extra effort to slide into position, making it essential in some cases to smooth out the hole for easy spinning alignment, while models displaying the enigmatic self-devouring serpent emblem known as Ouroboros load smoothly with no adjustments necessary.