COMPATIBLE WITH: These 50mm/1.97inch ear cushions ONLY fit headsets from Plantronics Jabra Yealink YHS33 Series Sennheiser SC 60 USB ML SC 75 SD Pro2 Leitner LH270 LH275 VXi Blue Parrott B250-XTS TruVoice HD-500 IPD IPH-160 Cyber Acoustics AC-104 AC-204 AGPTEK Arama Wantek MAIRDI Callez VoiceJoy Office Headset and Most standard size headphones perfectly with the same specification. PERFECT FIT: NOT for Jabra Evolve 20 30 40 65 75 and Evolve2 Series. These ear cushions are specifically designed Some specific models from Plantronics Supra Plus Encore HW251N HW261N HW510 HW520 Blackwire C225 C310 C320 3210 3220 3310 3320 3315 3325 and Jabra PRO 920 930 9450 9460 9465 9470 BIZ 620 1100 1500 1900 2400II GN 1900 2000 2100 2025 9120 9125 UC Voice 550 750, etc. For other headsets, please contact us for Compatibility Guide. FLAWLESS INSTALLATION: Without the need for any skills or tools, these replacement headset ear cushions are easier to be replaced with a few seconds to renew your headset completely. ULTIMATE COMFORT: Replacement Ear Pads for Plantronics are Made from soft and breathable leatherette material for extended wear. The ergonomic design conforms to your ears and provides long-lasting comfort. PACKAGED QUANTITY & WARRANTY: Each package includes 4pcs Ear pads and 4pcs Free Mic Windscreen foam covers(Headphone not included). We offer you 45 days free replacement and 12 months warranty. Pls feel free to contact us for any issue at any time. DO NOT buy the item if you can’t find your headset model in list. For other headsets, please consult us for Compatibility Guide. Compatible Headset List (included but not limited) Plantronics sp Series: SP7 SP8 SP11 SP11-A SP11-C SP12 Plantronics HW Series: Supra Plus Encore HW111N HW291N HW510 HW510V HW520 HW520V HW251N HW261N HW710 HW720 Plantronics: H251 H251N H261 H261N H351 H351N H361 H361N H51, H51N, H61, H61N, H91, H91N, H101, H101N Plantronics EncorePro 310/320 Series, Plantronics EP310/320 Plantronics Blackwire: 3310-A, 3310M-A, 3315-A, 3315M-A, 3310-C, 3310M-C,3315-C, 3315M-C, 3320-A, 3320M-A, 3325-A, 3325M-A, 3320-C, 3320M-C,3325-C, 3325M-C, C215, C225, C310, C320, C3210, C3210 USB-C, C3220, C3220 USB-C, C3215, C3215 USB-C, C3225, C3225 USB-C Jabra PRO Series: 920 930 9450 9460 9465 9470 9400BS Jabra GN Series: GN1900 GN2000 GN2100 GN2025 GN9120 GN9125, BIZ Series BIZ 620 Biz 1100 BIZ 1500 Biz 1900 Biz 2400II (NOT for Jabra Evolve 20 Evolve 30 Evolve 40 Evolve 65 Evolve 75 and Evolve2 Series) Jabra UC Voice: 550 MS 750 MS Yealink YHS33 Series Sennheiser: SC 60 USB ML, SC 75, SD Pro2 Leitner LH270 LH275 VXi BlueParrott B250-XTS TruVoice HD-500 IPD IPH-160 AGPTEK/Arama/Wantek/MAIRDI/Callez/VoiceJoy Office Headset and Most Standard Size Headsets with the same specification.