REMO SILENTSTROKE mesh heads, set of 4. 20 inch x 1 13 inch x 2 10 inch x 1 Stored at home without use. Please understand that these are used items before purchasing. ~From the official website~ "SILENT STROKE," which uses a single-ply mesh head, is a newly developed drumhead that can reduce the volume by about 90% compared to the sound when a regular drumhead is installed. When practicing at home, or in situations where there are sound restrictions, replacing with "SILENT STROKE" allows you to play as usual without worrying about the force you apply. *Decibel measurement Top: SILENT STROKE / Bottom: CLEAR AMBASSADOR [Full shot] General drumhead = ~ approximately 100 decibels (equivalent to the sound of a subway) [When SILENT STROKE is installed] = ~ approximately 80 decibels (equivalent to the sound of an alarm clock)