Commercial 4021 Stainless Steel Reverse Osmosis Housing. 4021 (4" x 21") Stainless Steel 304 Grade Reverse Osmosis Membrane Housing that will accept any standard 4021 RO membrane. The ports are 3/4 inch BSP and 1/2 INCH BSP Thread.4021 Stainless Steel Reverse Osmosis Housing. 2 end caps, seals, clamps. 2 Rubber compound mounting wedges and stainless steel straps bolts. All fittings required + ball valve. This item is in the category "Home, Furniture & DIY\Household & Laundry Supplies\Cleaning Tools\Squeegees & Window Cleaning". The seller is "collinswaterproducts" and is located in this country: GB. This item can be shipped to United Kingdom, Antigua and Barbuda, Austria, Belgium, Bulgaria, Croatia, Republic of, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Brazil, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, Korea, South, Switzerland, Taiwan, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei Darussalam, Cayman Islands, Dominica, Ecuador, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French Guiana, Iceland, Jersey, Jordan, Cambodia, Saint Kitts-Nevis, Saint Lucia, Liechtenstein, Sri Lanka, Macau, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Peru, Paraguay, Reunion, Turks and Caicos Islands, Aruba, Saudi Arabia, South Africa, United Arab Emirates, Chile, Bahamas, Colombia, Costa Rica, Dominican Republic, Guatemala, Honduras, Jamaica, Kuwait, Panama, Philippines, Qatar, El Salvador, Trinidad and Tobago, Uruguay, Vietnam.