Blue Force Gear Elastic Hook Cover Black. The Hook Covers are slightly tapered to fit securely on hooks or other hardware. Specifications for Blue Force Gear Elastic Hook Cover: Manufacturer: Blue Force Gear Fabric/Material: Military grade elastic Length: 1.75 in Weight: 5 g Additional Features: Covers MASH Hooks Features of Blue Force Gear Elastic Hook Cover Fits: Metal sling hardware such as Sling Snap Hooks or MASH Hooks Not recommended for use with Push Button Sling Swivels RED Swivels or Side Release Swivels as the Elastic Hook Cover may impede the use of the swivels. Build: Military Grade Elastic Slightly Tapered 1" x 1.5" x 1.75" Package Contents: Blue Force Gear Elastic Hook Cover Blue Force Gear HC-BK: Elastic Hook Cover Black