Specifications:
The document provides specifications for various BSP (British Standard Pipe) sizes, including dimensions and measurements. The sizes range from 1/8” BSP to 2” BSP, with corresponding measurements for each size listed in columns labeled A, B, C, D, and E.

Noise Levels:
The document includes noise level data for air silencers at different pressure levels (4 BAR and 6 BAR). The noise levels are measured in decibels (dB) for each BSP size, with specific values provided for each pressure level.

Product Model:
The document mentions a specific model of air silencer, the EP-METALLIC, and provides noise level data for this model at various BAR levels.

Key Data:
- BSP sizes and corresponding measurements.
- Noise levels at 4 BAR and 6 BAR for different BSP sizes.
- Specific model mentioned: EP-METALLIC.