Helmet Retention System Bicycle Outdoor Equestrian Boys Exercise

Model Number : Helmet Retention System Style : Portable Sport : Other Age : gt;14 Years Applicable People : Unisex Season : Universal Origin : Mainland China Certification : NONE Type : Helmet Description: Types A, B, and C can be interspersed with drawstrings, but Type D cannot. Helmet repair and modification accessories, with buttons, head circumference can be adjusted Durable with plastic knobs and nylon rack pull straps Installation method: turn the knob to the maximum head circumference range, fix the adjuster on the helmet with tape, check whether the positions of the nails and the holes are consistent, record the punching positions, then consider the installation method, cut off the excess parts, and then punch the holes , embedded in the hidden button, and finally installed Helmets for Cycling/Skiing/Equestrian/Climbing Specification: Color: Black Material: Nylon Size: Approx. A: Jack distance is 47mm/1.85inch Middle fixed foot spacing: 19mm/0.75inch B: jack distance 21mm/0.83inch 28mm/1.10inch Middle fixed foot spacing: 10mm/0.39inch C: Jack pitch 22mm/0.87inch 28mm/1.10inch Middle fixed foot spacing: 10mm/0.39inch D: Spacing between fixed feet: 10mm/0.39inch Package Includes: 1 Piece Helmet Retention System Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on line shopping!