Foam Replacement Earbud Earpad Sponge Covers for Sennheiser PX90 / AKG K420/K420P Headsets ,4 Pack / 2 Pairs Fit for Sennheiser PX90 / AKG K420/K420P Headsets Easy Install High Quality soft elasticity,comfortable ,durable & flexible Quantity: 2 pairs (4 ear pads) Size: 58mm / 2.3" Diameter