BMG Mods &ldquo;1590g Tall&rdquo; CNC Milled Anodized Aluminum 18650 Battery Enclosure: Royal Blue (Satin Finish) CNC-MACHINED - Solid Billet Aluminum: Square Corners, Beautiful Finish, and No "Hammond Lean" DURABLE ANODIZED FINISH - Several Bright Bold Colors, Perfect for Laser Engraving POWERFUL MAGNETS INCLUDED - Securely Hold the Cover In Place, Yet Allow Quick Removal 510 CONNECTOR HOLE - Slight Recess for 22-mm Diameter 510 Connector - Perfect Place for a Gasket or RTV Silicone Sealant CONVENIENT SIZE - 100mm x 50mm x 31mm Overall Dimensions - See Photos for Size Comparison to Hammond 1590g and 1590b Enclosures