GeLid RB-GR02-B Antivibration Rubber Fan Mounts 8 PC - Black Specifications: Case Mounting Holes: 4 - 5.5 mm diameter Fan Mounting Holes: 4 - 5.25 mm diameter Suitable for fans up to 120 x 120 x 38 mm (max. weight 300g) Length (mm): 26 - 35 & 8 diameter Material: Ultra-Soft Rubber Operating Temperature Range: -20 to +65 degree C