What Is It? | Rubber Cups

Name: What Is It? | Rubber Cups
Description: Ask This Old House plumbing and heating contractor Richard Trethewey presents two rubber cups—but what is it?

Ask This Old House plumbing and heating contractor Richard Trethewey presents two rubber cups—but what is it?

by Richard Trethewey

Resources:
The Horn Stand Amplifier cell phone speaker was manufactured by Kwark Products.

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