What are the difference among R95, N95 and P95?

What are the difference among R95, N95 and P95. Their filtration efficiency towards 0. 3 micron particles are more than 95%

According to NIOSH classifaction. Masks are separately into three series: N, R and P.
N: Not resistant to oil. This series of masks can only filter non-oily particles.

R: Resistant to oil/oil resistant. This series of masks owns a certain oil resistance which can filter both non-oily particles and oily particles.

P: Oil proof/ long-term oil resistant. Oil resistance of this series is stronger than R series masks. It can filter both non-oily particles and oily particles.

In the period of the spread of the new coronary virus, the n95 respirator is good in terms of the personal daily protection.

Shining Star SS6001 Filtering Facepiece NIOSH Certified

Rated 4.93 out of 5

$19.99 – $299.90 / $1.19 EA

Benehal MS8225 N95 Face Respirator

Rated 4.85 out of 5

$45.00 Original price was: $45.00.$22.99Current price is: $22.99. / $1.20EA

YQD95 NIOSH N95 Filtering Facepiece NIOSH Certified

Rated 5.00 out of 5

$34.50 – $59.00