• Model #2400
• Patented low profile arm assembly provides convenient at-rest and storage positions plus tension adjustment feature
• Soft-Seal™ ear cushions and very low band force provide unequaled comfort and fit
• Dielectric
• One mounting bracket fits all major slotted hard hats
• ABS ear cups and acetal arm assembly for maximum temperature resistance and durability
• NVLAP accredited NRR=24 dB

Attenuation data

Frequency in Hz	125	250	500	1000	2000	3150	4000	6300	8000
Mean (dB) Attenuation	15.9	19.3	29.3	34.8	34.5	38.3	39.5	39.4	39.5
Standard Deviation	2.5	2.4	2.8	2.9	2.8	2.1	3.5	3.7	3.2
NRR=24dB

Blackhawk™ also available as:

• Over-the-Head NRR=27