This gauge is made to the U.S. Weather Bureau specifications. Rain is collected in the top and funneled to an inner removable tube which is graduated in English markings. The overflow chamber catches the excess rain for later measurement. A one year rainfall record chart and a mounting bracket are included. 11" collection capacity. See below for metric model. All-Weather Rain Gauge RG100Regular price: $32.50Sale price: $27.50 All-Weather Rain Gauge - Metric Model27.9 cm x 2 mm capacity. Same features as above. RG101Regular price: $33.50Sale price: $28.50 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.