Check the listing for details. Film Developing Tank Spiral Reel Changing Bag Processing 135 120 4x5 BW Negative. Condition: New. Listed at 51.99 USD. FormatDevelopingTank & Film Changing Bag Features: 1.120 135 developing tank: Itcan be accommodated the 2 rolls of 135/35mm films at a time or 1 roll of 120 film. With the spiral reels, it can loaded 650mlchemical liquid. Processing for 135/35mm, 120/220, 126, 127 colour and B&W formats. The spirals will fit the Paterson tanks. Compatible with other tanks on the market. 2.4x5developing tank:Equipped with 1x 4x5 spiral,which can processing two sheets of 4x5 film in one time.With the spiral reel, it can be loaded 750ml liquid. 3.Film changing bag:21.6X22.8 (55x58cm), the weight is 0.145kg/5.1oz.The inner layer is silver-plated sunshade fabric and the outer layer is high-density polyester taffeta material, with inside and outside the two elastic cuffs ports, high-quality zipper bag end and nylon gluing. Package included(sent as buyer choosing order): 1 set 120/135 tank and 1 darkroom bag. OR 1 set 4x5 tank and 1 darkroom bag. Attention: When you want to develop 2 rolls 120 film at a time, please use the separator. If not, please remove the separator when processing developing.