3/8" Porting Block 400 Series - KA400-10 Be fitted to any combination units, fitted before the lubricator it can be used to port off a non-lubricated air supply that might be required for your system. These units are to be used in conjunction with Kelm™ Air Preparation, or as a stand alone BSPP manifold block. When using with existing Kelm™ Air Preparation, you will also require additional fixing brackets.