Plastic stacked metal film capacitor 10nF/50V, grid 5mm, +/- 5% tolerance
Label: 103J = 18000pF = 0.01?F

High volumetric efficiency
Low dissipation factor
Non-inductive construction
Operating temperature range: -40C to +85?C
Insulation resistance (25C): 1000MOhm
Self healing
Power rating: 50V
Grid: 5mm.