GOWE 6setsTBR20-450/650/1050mm linear rails+ 3 sets 1605 ball screws+3 sets BKBF12+ 3pcs 6.35x10mm coupler Go to amazon.com Related posts Top 10 recommendation 1605 450 2022 Feature6setsTBR20-450/650/1050mm linear rails+ 3 sets 1605 ball screws+3 sets BKBF12+ 3pcs 6.35x10mm coupler DescriptionGOWE 6setsTBR20-450/650/1050mm linear rails+ 3 sets 1605 ball screws+3 sets BKBF12+ 3pcs 6.35x10mm coupler