Getrasport Spear Gauge SGT Reliable Testing - The SGT spear gauge from Getrasport is suitable for checking the maximum and minimum diameters of spears. These must have a thickness according to the rules. The test is carried out immediately before winding. The gauge works as follows It must be possible to guide it over the spear with the front recess maximum thickness. The inner recess minimum thickness must not be able to be passed over the spear. If this rule is met, the test continues. - Product details - Material aluminium - Dimensions LxWxH 20x11x3.5 cm - Weight approx. 0.4 kg - Colour silver.