The Caldwell Lead Sled Weight Reservoir 2-pack is designed to enhance the stability and performance of your Lead Sled 4 or DFT 3 shooting rests. Each reservoir features a durable 600D Cordura nylon shell with a watertight bladder, capable of holding 1.2 gallons of water, sand, gravel, or other weight materials. With a wide-mouth opening for easy filling and a tensioning strap for secure attachment to the weight tray, these reservoirs provide reliable support and recoil reduction. Compact and efficient, they deliver up to 20 lbs of water or 33 lbs of sand combined, ensuring a steady shooting experience.