Weatherguard’s BED RAT sliding platforms are available to fit full-size and compact pickups, come in three sizes and have a total load capacity with weight evenly distributed of 750 lbs. Rails are mounted on heavy-duty ball-bearing rollers that have been vibration-tested for maximum loadability with a full 70-percent extension. They have 10-in.-high steel side and back panels with a white finish and keep materials from rolling off the deck. They weigh 97 lbs. and are 4¾ -in. high by 22-in. wide by 54-in. long.