Available in either repair kit form, or as a complete mechanical seal assemby, fitted within the stainless steel outer collet. The Style BB17 is a direct replacement for the Seal fitted to the most common EMU Pumps. Repair kit comprise of all wear parts being; two stationaries with 0-Rings, central rotary with elastomer diaphragm, antirotation pins and springs for stationaries and retaining pins for the collets.