escripetion: T-slot tachograph sucker, sucker diameter 54mm, height of about 58mm, fitting 10 * 8mm, slot width 2.5mm. Black silicone base, strong suction, suitable for T-slot tachograph. Mini does not block line of sight. Specification: Interface Size: 10mm 8mm Slot: 2.5mm wide Sucker diameter: 54mm Sucker height: 58mm Package Included: 1 X Car DVR T-type Bracket