Realistic Mach I Speaker Foam Surround Repair Kit - Mach 1, Mach One Some of the models that use this foam include: Radio Shack Realistic Mach 1, Mach-1, Mach1, Mach One, 3802, 40-4029. **Mach 1 and Mach 2 have two distinctly different foams. This one is made specifically for the Mach 1** Complete 2 speaker foam surround installation kit - 15 inch Same surround that professional reconers use; NOT a cheap Chinese imitations! Easy to follow step-by-step installation instructions and videos FREE phone support at 1-800-397-9575 and FREE shipping within the U.S.