This lens bag, designed for smaller lenses such as 50mm, 85mm, and teleconverters, rotates and locks for easy access. Compatible With: Pro Speed Belt, the Speed Belt Packs, or separately with a regular belt. Internal Dimensions: 3.25” Diameter x 6.5” HFeatures:Lightly padded/ compressibleBungee cord top-accessSeam-sealed raincoverFront mesh pockets for lens capsAttaches to Pro Speed BeltAttaches to Speed Belt PacksIncludes “Rotate or Lock” mechanismWebbing shoulder strap attachmentWorks with regular beltIncludes:Lens Changer 15 CaseSeam-Sealed Raincover