Features: Hydrofoil Mounting T Nut is perfect for attaching hydrofoils to surfboard and kiteboards. Make from Brass/Stainless Steel, strong and Enduring, not easy to rusts. They're widely used on most hydrofoils and necessary for anyone look to upgrades their surfing or kiteboarding experience. Great for surfing enthusiasts, these mounts enhances your hydrofoil experience on water. Ensure your surfboard performances with our Hydrofoil screw Mounting T-Nut. Specifications: Materials: Brass/Stainless Steel Style: 8mm Brass 4pcs set crosses screw/8mm Brass 4pcs set hexagonal screw/6mm Brass 4pcs set crosses screw/6mm Brass 4pcs set hexagonal screw/8mm stainless steel 4pcs set crosses screw/8mm stainless steel 4pcs set hexagonal screw/6mm stainless steel 4pcs set crosses screw/6mm stainless steel 4pcs set hexagonal screw Nut size: about 2x1.4cm/0.79x0.55inch 6mm length: about 2.4cm/0.95inch 6mm thread diameter:about 6mm/0.247inch 8mm length: about 2.50cm/0.98inch 8mm thread diameter: about 8mm/10.35inch Package Includes: 4Pcs Hydrofoil Mounting T Nut note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.