What is the proper material and durometer (hardness) for Measurement Prover Spheres?
Neoprene and Urethane are the two primary materials used for prover spheres. Neoprene is typically used with crude oil and often for water draws. Neoprene provides a good seal and long life but because of the softness (50-53 durometer), we do not use Neoprene in high pressure situations or high chemical content.
