Exchangeable Blood Vessels - Normal, Pkg. of 100 by Nasco Healthcare $314.95 SB51837 Exchangeable Blood Vessels - Normal, Pkg. of 100 / SB51837 / Cart Title Exchangeable Blood Vessels - Normal, Pkg. of 100 Product ID SB51837 CheckoutType Cart Add to cart Use with IV Pad (SB49544U">SB49544U).