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Silicone Elastomer 4x4 Button Keypad - for 3mm LEDs : ID 1611 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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ELASTOSIL E43N 310ML 908-51362 WACKER - Silicone rubber | transparent; 0.31l; ELASTOSIL E43N; E43N-310ML | TME - Electronic components
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