Manufactured from the highest purity Zirconia, Wilmad MAS Rotors provide the ultimate solution for analysis of solid samples. Caps are fitted with O-rings for improved sealing. The MAS Probe and caps are 100% compatible for most solid state NMR spectrometers. Utilizing precision optical equipment, each MAS Rotor is thoroughly inspected before and after the precision machining process to ensure there are no material irregularities. Spin testing of each rotor is performed to only the highest specified spinning speed, assuring performance without overspinning the rotor.