8*12*30mm Self-lubricating Linear Bearing
JDB Self-lubricating Linear Bearing is the best Bushing or Sleeve Bushing for high performance and much longer life time.
It's better Bushing than Ultimaker adopted now. The Bushing has 14 holes filled with Graphite, which provides better self-lubricating performance.
8*12*10mm inner 8mm and outer 12mm, length 10mm
8*12*15mm inner 8mm and outer 12mm, length 15mm