Hello, Please see sizing below. Small/Medium Medium Large 48-57cm / 19-22.5in 55-61.5cm / 22-24in

Is this ansi and or osha approved?

Not sure about ANSI or OSHA. Best bet is to contact Black Diamond directly and ask if the compliances met already on the helmet encompass the ones you are asking about. Here is what the instruction manual indicates: EN 12492: This number indicates that this helmet conforms to EN 12492:2012, the European Standard for “Mountaineering equipment – Helmets for mountaineers – Safety requirements and test methods.” UIAA: The presence of the UIAA Label indicates that the helmet has been tested according to UIAA 106 and awarded the UIAA Safety Label. : The CE mark of conformity indicates fulfillment of the requirements of the Personal Protective Equipment Directive (89/686/EEC) or Personal Protective Equipment Regulation (EU 2016/425). The Declaration of Conformity for this product may be viewed at http://blackdiamondequipment.com/DOC

How well would this helmet protect against falling rocks from above? Is it as strong as an industrial hard hat?

Compared to a hard hat, I’d think this helmet offers more protection. Of course, its safety depends upon the size of the rocks and the distance it falls.

Is it possible to separate the plastic from the hardware/foam in order to change out the shell color or paint the shell?

The components of this helmet are not meant to be separated (with the exception of the foam comfort padding), and we cannot recommend any modifications to protective equipment.

ASIN	B07KXYCKY2
Age Range Description	Adult
Age range (description)	Adult
Athlete	climbing
Best Sellers Rank	41,600 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 7 in Climbing Helmets
Brand	Black Diamond
Brand Name	Black Diamond
Colour	denim
Country Of Origin	China
Customer Reviews	4.6 out of 5 stars 422 Reviews
Global Trade Identification Number	00793661367178
Included Components	Helmet.
Inner Material	Expanded Polystyrene
Item Dimensions	35 x 30 x 15 centimetres
Item Type Name	Climbing helmet
Item Weight	354 Grams
Manufacturer	Black Diamond
Model Name	Half Dome Helmet
Model name	Half Dome Helmet
Outer Material Type	Acrylonitrile Butadiene Styrene (ABS)
Product Style	Single
Product Warranty	2 year manufacturer
Recommended Uses For Product	Climbing, via ferrata
Size	M/L
Special Features	Lightweight
Special feature	Lightweight
UPC	793661367178
Unit Count	1.0 count

Black Diamond Half Dome Helmet SS23

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