Small RNAs are potent regulators of gene expression. They also act in defense pathways against invading nucleic acids such as transposable elements or viruses. To counteract these defenses. viruses have evolved viral suppressors of RNA silencing (VSRs). https://www.roneverhart.com/032-0092-Gauge-Air-Compressor-2-300-PSI-X-1-8-NPT-Gauge-Coleman-Powermate/