4.
Ning has worked in the salon industry as a beauty professional with a passion for nail art, and has established a strong client base. Now she is ready to strike out on her own, and is planning to open her own salon. Before she can open for business, though, she must purchase all of the equipment, materials, and supplies she'll need to provide nail services to her clients. hide narrative After purchasing all of the equipment she needs, Ning focuses on selecting her implements. As she searches for multiuse implements, she should only choose those made of which material?