Features [EXCELLENT MATERIAL] Made of ABS material with good toughness, UV protection and can withstand harsh marine environments. [MULTIPLE FUNCTIONS] Reduce drag and cavitation, reduce fuel consumption, improve high and low speed steering and reduce arcs. [GOOD STABILITY] Outboard hydrocopter can be used to increase stability to provide faster glide and smoother riding. [Easy to Install] Equipped with stainless steel bolts, nuts and washers accessories, easy to install and disassemble. [2 x HYDROFOILS] Includes a pair of hydrofoils for outboards from 4 to 50 HP to significantly reduce fluid resistance and improve performance. Specification: Item type: hydrofoil Product Material: ABS Color: Black Distance from mounting hole: approx. 6 cm/2.4 inches Applicable: Suitable for outboard propellers below 50HP Package list: 2 x External stabilizer fins 1 x mounting accessories pack Package List 2 x Outboard Stabilizer Fins 1 x Mounting Accessories Pack