1. Certification:CCS EC 2. Product Inspection Standard: Requirements of 1996 Amendments to SOLAS 1974 and LSA Code and Resolution MSC.81 3. Outer Diameter: 720/760mm 4. Inner Diameter: 440mm 5. Thickness: 95-115mm 6. Weight: 2.5kg above 7. Buoyancy: 14.5kg above