... different profile. 2,stronger roller,load 80kgs door. 3,with soft closing system. Sliding door roller with damper1,For hanging door,max load 80kgs.2 ... different profile.3,soft closing system,make the door closing quitely and softly.4,strok distance:110mm5,Maximum pulling force:18N6,Running ... second.7,Life:50000 times.Size and application illustration: SLIDING DOOR ROLLER WITH DAMPER