base dimension: 41mm (width) x 40.5mm x 8mm
top dimension: 41mm x 45mm
Materials: Molded Light Weight Polymer, rubberized patterned top and metal Standard 1/4" Screw Be Advised: Some Velbon tripod models come with different heads that might not be compatible with this replacement quick release. Please measure the head you are using to make sure it will fit.