It looks like someone had previously placed filter material in the gap. Ships quickly from central USA.The item "Graco Monark Air Powered Pump 224343 and Air Motor 205997, 2.5 GPM, 51 Ratio" is in sale since Wednesday, July 18, 2018. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Other Pumps". The seller is "irvinelectronicsalvage" and is located in West Liberty, Iowa. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Bangladesh, Bermuda, Guernsey, Gibraltar, Iceland, Jersey, Jordan, Liechtenstein, Sri lanka, Luxembourg, Monaco, Maldives, Oman, Pakistan.