SpearGun Rubber Free

Speargun fishing / hunting with both amateur and professional sportmen / sportwomen / hunters / fishers can not be interested in their work dropped from his hand and facilitates calculation tool.

- An actual calculation tool for proper rubber length and diameter
- The spear fishers / harpoon hunters gain time and money to select the appropriate rubber
- Pictorial easy to understand, flexible and fun to use
- Different calculations in metric and inch
- Computing facilities in hundreds of different combinations
- Satisfactory results