Previous Product Next Product The images have the illustration purpose, the product may not be the same. Check the description or contact our sales team. MARUS #75-139-00 BACK HEIGHT ADJUSTMENT KNOB $7.87 MARUS #75-139-00 BACK HEIGHT ADJUSTMENT KNOB quantity Add to cart SKU: PE1080 Category: Parts Equipment Description Description MARUS #75-139-00 BACK HEIGHT ADJUSTMENT KNOB [AcmeDent sku=’PE1080′]