12 Units of Krest Combs began by manufacturing just one comb style for the professional beauty industry. In order to succeed, they knew that the one style had to be made from the finest quality materials and workmanship in order to be accepted by knowledgeable, hard-working, professional stylists. As a result, QUALITY became the cornerstone of the company and QUALITY remains the cornerstone today. DUPONT Delrin is virtually chemically inert and will not absorb sterilizing solutions, perms, conditioners, shampoos, oils, water, etc. Also can be wet or dry sterilized. DUPONT Delrin withstands the extreme heats of blow drying. Made exclusively from DUPONT Delrin acetal polymer a 100% professional thermal material. Heat resista hair comb. Works great with flat irons or hair dryers. 12 units. Great for Wig and Tease Comb. Also used to give volume to natural hair and wigs.