The replacement ear cushions are only compatible with some specific headsets from for , including for PRO 920 930 935 9450 9460 9465 9470. No other tools needed,only a few seconds to have a perfect new headset. your old earpads and put on our headset replacement ear pads. You just need to stretch the earpads around to cover all edges of your headset's ear loop. It has good softness and elasticity and good abrasion and scratch resistance, not easy to damage, long service life. Waterproof and , with good waterproof performance, it can effectively prevent moisture from penetrating into the interior, while the is smooth and easy to clean, not easy to stain. Earpads overall diameter 50mm or 1.97inches,please note our earpads size and your headphone size before buying. Name:Replacement Ear Cushions Part-time model:Compatible with for PRO 920 930 935 9450 9460 9465 9470 Colour:Black Material:Protein Leather and Memory Foam Size:Diameter:50MM Package Contents: 4 x Replacement Ear Cushions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.