Ob Chains Are To Be Used To Aid In A Difficult Calf Birth. Can Be Used With Fetal Extractors And/Or Ob Handles. Ideal S Ob Chains Are Available In 30. 45 , And 60 Lengths. Zinc- Plated Steel With An Added Rust Inhibitor. Search_Phrases: Pet Accessories,Pet,Dog,Cat,Pet Products,Durvet Ideal Instruments,Durvet-Ideal Instruments Ob Chain 30In