Marine grade stainless steel spring style hatch and window support.When hatch or window is in an open position the spring coil becomes a rigid support.To close, apply side pressure to the middle of the spring coil and the support will collapse to a closed position.Other Details: Part No. Description OverallLength(mm) Spring Ø(mm) SpringLength(mm) Mount Screws(mm) 36364 Stainless Steel Spring Hatch Stay 235 11 220 3.5 c/s 4 c/s 36365 Heavy Duty Spring Hatch Stay 280 16 260 4.5 c/s