It's one saving stetcher which can be separate.mainly used for battlefields first-aid and transferring the fractured wounded.Features:Both sides of the stretcher are equipped with hinges which can divide the stretcher into left and right parts.It can place ghe sick into the stetcher,transtfer them on the operating table or sickbed,then take the strtcher off qucckly in the situatin of umnovig them.The length of the stretcher can be adjusted freely according to the sidk body length.It can be used in the combinatin with YD-3B.