Item Floor Mount Vibration Isolator Isolator Type Spring Capacity Range 230 to 310 lb Deflection 0.75 in to 1.00 in Height 4 1/2 in Width 2 5/32 in Spring Color Yellow Bolt Size M10 x 100mm Dimension A 4 in Dimension T 1/2 in Dimension SW 5/16 in Dimension HCL 4 3/4 in Dimension HCW 1 in Dimension MBD 1/4 in Dimension SBC 5 in Dimension H 4 1/2 in