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https://www.sennheiser.com/de-at/catalog/products/kopfhorer/headphone-accessories/headphones-14-jack-adapter-543684
Official Sennheiser 1/4" (6.3mm) Screw-On Jack Adapter | Gold-Plated
Genuine Sennheiser 3.5mm to 6.3mm (1/4") screw-type adapter. Gold-plated for perfect signal transfer. Compatible with HD 600, HD 25, HD 280 PRO, and more.
3mm screw
https://www.sennheiser.com/en-ee/catalog/products/headphones/headphone-accessories/headphones-14-jack-adapter-543684
Official Sennheiser 1/4" (6.3mm) Screw-On Jack Adapter | Gold-Plated
Genuine Sennheiser 3.5mm to 6.3mm (1/4") screw-type adapter. Gold-plated for perfect signal transfer. Compatible with HD 600, HD 25, HD 280 PRO, and more.
3mm screw
https://www.sennheiser.com/zh-hk/catalog/products/headphones/headphone-accessories/headphones-14-jack-adapter-543684
Official Sennheiser 1/4" (6.3mm) Screw-On Jack Adapter | Gold-Plated
Genuine Sennheiser 3.5mm to 6.3mm (1/4") screw-type adapter. Gold-plated for perfect signal transfer. Compatible with HD 600, HD 25, HD 280 PRO, and more.
3mm screw
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Unique Bargains 5 Pcs 3mm Thread Ceiling Screw Hooks Picture Hanger Lamp Wire Holder - Newegg.com
Buy Unique Bargains 5 Pcs 3mm Thread Ceiling Screw Hooks Picture Hanger Lamp Wire Holder with fast shipping and top-rated customer service. Newegg shopping...