New, state of the art bearing slider allows for less maitenance and higher load rating. Lighter design allows you to use 10" to 15" long, 5" O.D. springs. Handy pull pin design does away with the clumsy jam nut on the spring adjusting plate. Includes two 1/2" rod ends. Can run 20x more side load than standard linear bearing Has 5x the life of standard bearing Slotted plate for fast spring changes Spring retainers are 2" high Double lip dirt seal 24.4" extended 16.2" collapsed