Meltrope 3 Rear tonearm rubber isolator. Hand cast in a modern technical rubber that will not perish like Natural rubber. 
Shore / Hardness is approx 45A Durometer. Holds a Meltrope 3 soundbox very securely on a tonearm.
 
PLEASE NOTE= NO SOUNDBOX IS INCLUDED IN THE ITEM, THE ITEM IS FOR A SINGLE RUBBER ISOLATOR ONLY.
SOUNDBOX IN THE PICTURES IS FOR ILLUSTRATION PURPOSES ONLY & IS NOT INCLUDED. 

Item for sale  is 1X rubber fixings that measure 17.5 mm internal diameter, 25.8mm external diameter & around 11 mm height  
thanks for looking