Our LensCoat lens Sack Pro series is our “U” shaped lens Sack with a removable mounting plate. The mounting plate is made of lightweight aircraft-grade aluminum with a 3/8”-16 mounting screw allowing you to mount a gimbal or ball head. The mounting plate can be removed allowing your lens Sack Pro to be used as a standard bean bag camera/lens support platform. The lens Sack Pro provides excellent stability for cameras with lenses up to 800mm. Whether you are shooting from the ground, slick surfaces, railings, car doors, or Safari vehicle, the lens Sack Pro will provide a reliable steadfast platform. All of our lens Sacks are constructed with the same heavy-duty water-resistant Codura as our expandable long lens bags and travel hood. The lens Sack Pro comes to you unfilled and its 2 high quality YKK locking zipper prevents leaks while easily allowing you to add the fill of your choice. Additional features of the lens Sack Pro: lightweight aircraft-grade aluminum mounting plate with 3/8”-16 mounting screw for a gimbal or ball head mounting plate is removable for standard bean bag use heavy-duty water-resistant Codura 2 locking zippers for easy filling and emptying non-slip grip material on the bottom (in the “U”) M.O.L.L.E webbing system to easily add pouches and accessories 2 storage pockets 2 adjustable straps to secure and carry your lens Sack Re-enforced stitched seams available in black, digital Camo, Forest Green Camo, real tree Max4, real tree AP snow proudly made in the USA weight of lens Sack Pro empty - 12oz (.34kg) weight of lens Sack Pro filled with sunflower seeds - 11lb (4.99kg) weight of mounting plate - 5.9oz (.17kg) dimension when full - 8"h x 7.5"W x 11"d (20.32H x 19.05W x 27.94W cm) ***Shipped empty