YETTER KNIFE 3/8"X 2.5 X13 CLTR 1/2SS TFor the Yetter 20" Coulter Front swept knife for fertilize application behind a coulter. 3 8" x 2 1 2 " x 13" with 1 2" stainless crushed open ended tube. Has no tube protector. Application Liquid Brand AgSmart Discharge Open Length 13 Inch Product Type Fertilizer Knife Style Coulter Style Thickness 3 8 Inch Tube Protector No Tube Size Type 1 2 Inch Stainless Width 2 1 2 Inch