The rollers are equipped with lubrication grooves that distribute lubrication over time. Long life, low noise, low temperature up to -45 degrees Celsius5. Using precision ball bearings to reduce garage noise, nylon rollers are much quieter than ordinary garage rollers. Suitable for: automatic garage doors, arched garage doors, gates, solid wood garage doors, crush-resistant garage doors, honeycomb garage doors, technical garage doors, remote-controlled garage doors, gates Villa garage roller 11.5 x 4.5 cm / 4.53 x 1.77 (LxDia) Weight: 534 g Package contents: 4 garage door rollers