Materials/Modifications From 1951, with lucite and basic venting, to the current materials and modifications reflecting the growth in our industry, Mid-States has always been there to provide you with an extensive up-to-date selection of materials and modifications. Mid-States Materials Characteristics Chart - Click to view Mid-States Materials Cross Reference Chart - Click to view MATERIALS Quick Reference Links Exclusive Audtex Exclusive Apollo Softex Marveltex Silicone Exclusive MS-7000 MSL-90 Rainbow Lite Lucite Polyethelene E-Compound Soft-Canal Molds MODIFICATIONS Quick Reference Links Earmold Modification General Acoustic Considerations Venting Select-A-Vent/Positive Venting Valve Damping Horn Coupling Earmold Modification Information

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