No. Pitch Links Ave.Weight Ultimate Chain in Inches per 10 FT. Per FT.In LBS Strength Construction 348 3.031 40 2.1 24,000 SPECIAL PIN X348 3.031 40 2.2 24,000 SPECIAL PIN 458 4.031 30 3.1 48,000 SPECIAL PIN X458 4.031 30 3.2 48,000 SPECIAL PIN 468 4.031 30 7.5 70,000 SPECIAL PIN 658 6.031 20 2.6 48,000 SPECIAL PIN 678 6.031 20 6.5 85,000 SPECIAL PIN X678 6.031 20 6.7 85,000 SPECIAL PIN 698 6.031 20 11.4 130,000 SPECIAL PIN