Artisan Power Polycom SpectraLink 8020 and 6020 Clear Silicone Gel Case: WTO350 (2 Belt Clips) Fits the SpectraLink 8020, 6020, the Nortel 6120, and the Avaya 3641 phones. Clear Gel Case made from Healthcare Grade Silicone. 2 Belt Clips Included: A Stationary, Slim, Clear Clip & A Larger, Rotating, Black Swivel Clip. Matches OEM Part Number WTO350 Manufactured by Artisan Power, a leader in high quality replacement products.