BEAL / AIR FORCE 2 BEAL / Air Force 2 [2 Colors] This belay device is compatible with twin/double ropes from 7.3mm and single ropes from 8.5mm. The V-shaped slot on one side provides braking power to assist with the use of thin ropes. The V-shaped slot on the other side eliminates unnecessary snagging by the edges of the belay device, enabling smooth rope control. ■Specs■ ◇Certification: Type: EN15151-2-Type 4 ◇Weight: 73g ◇Compatible Rope Diameter (tolerance ±0.2mm): ・Twin/Half: 7.3mm〜 ・Single: 8.5mm〜 ◇Material: Aluminum alloy, etc. ◇Color: Please choose one. □Blue □Orange