25-50 PC Push Retainer Clips for Honda 91566-SP0-003 1990-On and so on (25) Top Head Diameter :12 mm ( 0.47") Middle Head Diameter: 17 mm ( 0.67" ) Bottom Head Diameter: 15.5 mm ( 0.61" ) Stem Length: 14.5 mm ( 0.57") Fits Hole Size :11 mm ( 0.43")