Item Type: Hard Hat Material: ABS Color: Yellow Model: CHABS (102106) Knob Type Rear Hoop Adjustment: Approx. 51-62cm/20.1-24.4in Description: Anti-ultraviolet rays, with ventilation holes, 8-point fabric lining, knob adjustment It complies with the European standard EU 2016/425 regulations, and complies with the following European standards: EN397:2012/A1:2012, and complies with the US standard ANSI Z89.1-2009. At the same time, it meets the national standard: GB2811-2019. 1、Designed with vent holes, good breathability, suitable for long?term wearing, no stuffy feeling, refreshing and comfortable. 2、Using high?quality ABS material, high strength, good impact resistance, heat resistance, high and low temperature resistance and chemical resistance. 3、Compression?resistant cushion cap lining, anti?impact and puncture?resistant. There is a gaps of 25?50mm between the cap shell and the lining, the force reduced by the cap lining buffer is more than 2/3, and the cap shell will not be deformed by the force. 4、Convenient knob?type rear hoop adjustment, 20.1?24.4in adjustment range, can be adjusted according to individual head shape. 5、Wide range of applications, suitable for power industry, automobile manufacturing, construction sites, machinery manufacturing, etc. 1 x Hard Hat 1 x Manual