Metal Joint Boat Cardan Gimbal Couplings, Universal Connector Multi-spec With. Specifications: Outer Diameter of Flexible Fitting: 0.3 in (8 Mm) Universal Joint Length: 0.7 Inches (18 Mm) Screw Hole Size: M3 2mm - 2mm-M3, 2mm, 2.3mm-M3, 2.3mm, 2.3mm-M3 Outer Diameter of Flexible Fitting: 0.4 Inches (9 Mm) Universal Joint Length: 0.9 Inches (23 Mm) Side Screw Fixing Hole: M3 0.08 Inch (2 Mm), 0.11 Inch (3 Mm), 0.16 Inch (2 Mm), 0.16 Inch (4 2.3mm, 3mm-M3, 2.3mm, 4mm-M3, 3mm, 3mm-M3, 3mm - 3.17mm-M3, 0.12 in (3 Mm), 0.12 in (4 Mm), 0.12 in (3.17 Mm), 0.12 in (3.17 Mm) (M3, 3.17mm, 4mm-M3, 4mm - 4mm-M3 Outer Diameter of Flexible Fitting: 0.4 Inches (11 Mm) Universal Joint Length: 0.9 Inches (23 Mm) Side Screw Fixing Hole: M4 0.1 Inch (3 Mm), 0.2 Inch (5 Mm), 0.1 Inch (3.17 Mm), 0.2 Inch (5 Mm) -M4 0.2 Inch (4 Mm), 0.2 Inch (5 Mm), 0.2 Inch (4 Mm), 0.2 Inch (6 Mm)-M4 0.2 Inch (5 Mm), 0.2 Inch (5 Mm), 0.2 Inch (5 Mm), 0.2 Inch (5 Mm), 0.2 6mm, 6mm-M4 Outer Diameter of Flexible Fitting: 0.6 Inches (14 Mm) Universal Joint Length: 1.4 Inches (35 Mm) Side Screw Fixing Hole: M4 5mm - 8mm-M4, 6mm - 8mm-M4, 6.35mm - 8mm-M4, 8mm - 8mm - M4 Outer Diameter of Flexible Fitting: 0.6 Inches (16 Mm) Universal Joint Length: 1.4 Inches (35 Mm) Side Screw Fixing Hole: M4 8mm, 10mm-M4, 10mm, 10mm-M4 . We are an international based seller that will ship your order from abroad, please at least a minimum 14 working days for delivery right now due to the ongoing delays in shipments globally.