Noise Reduction Clamp - Neoprene Lined 4" NOISE REDUCTION CLAMP (FK 100) These clamps are used with fans, carbon filters and ducting. The neoprene lining makes for a tight, vibration free fit. Also use to clamp two 6 Sun Tubes together.  | Manufacturer's Product Information |  | | | 2007 MSRP Each $ | 8.95 | | Case Weight | 0.48 LB | | Case Dimensions | 4.5 x 4.5 x 2.5 IN | | Case Quantity | 2 | | |