Extension tubes have the standard greying/cracking, its normal and pretty much happens within the first few years, its just a tube and it doesnt cause any issues with reflection etc. Polaroid back tested and works great, clean. No mold or fungus, well taken care of and always in a pelican case when not in use. Owned and maintained for 9 years. The item "Mamiya RZ67 Pro II Medium Format SLR, 180mm, 140mm Macro, 2 Extender Tubes, Back" is in sale since Sunday, March 24, 2019.This item is in the category "Cameras & Photo\Film Photography\Film Cameras". The seller is "280zxstone" and is located in Trumbull, Connecticut. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Colombia, Panama, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.