This 3/4 inch welded tip knife has a carbide insert for prolonged wear life. The carbide also keeps the nose of the tip sharp for good penetration, even in hard compacted soils. The NH3 tube is 1/2 inch (12 mm) O.D. and is designed to work with cold-flow

This knife has a 3/4 inch welded carbide tip. The tube on this knife is longer and extends back further than the tube on the 200-KNF-7521. The extended tube allows this knife to be used on air seeders or air drills that have seed boots on the back of the

This NH3 knife holder can be used with any of the Category 1 replaceable tips. That means you can go from a narrow 3/4" to a 4" spread.

This knife has a 3/4 inch (19 mm) carbide tip. The NH3 tube is 1/2 inch (12 mm) O.D. and is designed to work with cold-flow anhydrous kits. This knife can be purchased with a regular chrome tip (410-KNF-0824).

This NH3 knife holder can be equipped with any Category 1 replaceable tip. The picture shows the holder assembled with a 3/4 inch carbide tip, 200-TIP-0801. The NH3 tube is 1/2 inch (12 mm) O.D. and is designed to work with cold-flow anhydrous kits.