SPEC Medium + Base Plate Only. This is recommended for setting up multiple different vehicles/locations to transfer your gear quickly and efficiently. You can move your case/bag from one vehicle to another with ease by mounting the same-size Base Plate at each location. Designed for medium-sized gear, medium-hard cases, bags, etc. Aircraft-grade aluminum Stainless steel pin Lockable 316 Stainless hardware Black: Powdercoated Patented self-aligning design Patented removable and rebuildable pin and block 100% Designed and manufactured in Phoenix, AZ USA Medium+ Mount Dimensions: 12"x12" *Note: Black powder coating is subject to wear.