Happybuy Linear Rail 3 Ballscrew RM1605-350mm 650mm 1050mm ...
Linear Guide Rail Set The listing is for supported linear rails SBR20-300/600/1000 mm rails(6 supported rails+12 SBR20UU bearing blocks), 3pcs of ball screws RM1605-350/650/1050 mm-C7(3 screws+3 ballnuts+3 end-machinings), 3 sets of BK/BF12(with locknuts and Cir-clips) and 3pcs of flexible couplings.