we are a professional manufacturer for Linear Motion Bearing,Linear Guide,Ballscrew,Linear Rail,Linear Support and End Support etc.The Rail Support we can offer wide with following characteristics:#Shape of housing  #High accuracy #Dust proofing #Inexpensive price #Easy installation #Compact design  For BK/BF Support Blocks,our model include:BK10  BK12  BK15  BK17  BK20  BK25  BK30  BK35  BK40BF10  BF12  BF15  BF17  BF20  BF25  BF30  BF35  BF40