Type : Blue coupler

Diameter : 14mm (D=outside diameter of the coupler not d1 or d2)

Length : 25mm

d1xd2 : 3x5 , 3x6 , 3x8 , 4x4 , 4x5 , 4x6 , 4x7 , 4x8 , 5x5 , 5x6 , 5x6.35 , 5x7 , 5x8 , 6x6 , 6x7 , 6x8 , 6.35x6.35 , 6.35x8 , 7x8 , 8x8

Material : Aluminum alloy

Set Screw hole diameter : 4mm (4 screws are provided)

Package content : 2pcs coupling with 4pcs screws