Cryogenic treatment (deep tempering) for motor sports, firearms, softball bats, golf clubs, and musical instruments. In Decatur, IL.

Custom-built cryogenic systems and treatment of items to increase strength and durability. In Largo, FL.

Cryogenic processing for racing and many industrial applications, including tools and firearms. In Chicago and Rockford, IL, Charlotte, NC, and Waltharn, MA.

A manufacturer and distributor of cryogenic processing equipment, which licenses its techniques to companies in several states. In Lenexa, KS.

Specializes in deep cryogenic tempering, extending the useful life of tools, metal parts, plastics and other materials. In Cedar Rapids, IA.

Provider of Nitrofreeze Cryogenic Treatment services for metal treatment as well as cryogenic deflashing and deburring for industrial, commercial and recreational applications. Site includes Application Notes and Technical Articles on cryogenics. Located in Worcester, MA

Cryogenics International manufactures deep cryogenic treatment systems and provides cryogenic processing for automotive racing engines, tools, musical instruments, etc. In Scottsdale, AZ

Thermo tempering of metals for maximum performance, durability, and life. In Zionsville, IN.

Cryogenic treatment of all metal tooling, stamping dies, gun barrels, engine components, brass instruments. To make them more wear resistant. In Wooster, Ohio.

Temper-Master cryogenic processor manufacturing and tempering. Improves durability and performance of tools, musical instruments, and gun barrels. In Springfield, MO.

DMP manufactures industrial cryogenic tempering systems for both high-temperature and low-temperature use.

Cryogenic processing of equipment. Has a nicely detailed overview of the company's Vari-Cold cryogenic process and equipment. In Spruce Grove, Alberta, Canada.

Cryogenic Processing improves the life of your guns, engines, instruments, and tools. Located in Minneapolis, Minnesota, United States.

Deep cryogenic processing and tempering of all your tooling and wear parts. In York PA.

Deep Cryogenic Processing of most ferrous and non-ferrous materials to increase durability and wear resistance. Located in Suffolk, England