This reservoir is compatible with D5 pumps, such as the Swiftech MCP655/MCP655-B. Dimensions: 149 x 85.6 x 60.5mm. G1/4" threaded fittings and pump are NOT included and are necessary to use this item. ***Note: This product requires the original D5 screw ring to attach the pump to the reservoir.*** No returns for refund will be accepted on this item after it has been opened. Defective items can be returned only for replacement with same item. Please verify compatibility with your system/case before purchasing.