12pcs: 4 Small, 4 Medium, 4 Large (Black) Soft Replacement Eartips Earbuds Set for AKG by Harman: K324P, K321, K328, K330, K340, K350, K374, K375, K390, K391 NC, Q350 In-Ear Earphones 12pcs: 4 Small, 4 Medium, 4 Large (Black) Soft Replacement Eartips Earbuds Set for AKG by Harman: K324P, K321, K328, K330, K340, K350, K374, K375, K390, K391 NC, Q350 In-Ear Earphones