Connecting Rod Bearings; Tri-Metal Hardened Steel Backs; Identical Halves Max Overall Length: 0.709"(18.00mm) Max Std Shaft Size: 1.7713"(44.991mm) Min Std Tunnel Size: 1.8898"(48.000mm) Size: .50 Min Std Shaft Size: 1.7707"(44.975mm) Oil Clearance: Standard Max Std Tunnel Size: 1.8904"(48.016mm) Max Wall at Crown: 0.0588"(1.493mm)