specification: product name: well nut 100% color: black main material: rubber size: 12mmwx14mmh thread size: m5 quantity: 10pcs fits?all m5 metal bolts for installation: windshield, fairings, motorcycle hoods, etc.? Package Included: 10 x Well Nuts Note: 1. Important No Instructions Included. Installation professional is highly recommended!?2.Please check the size measurement chart carefully before making