Your aircraft's hydraulic systems deserve the highest quality hydraulic fluid. Keep your aircraft control system effective and ready for flight with Skydrol LD-4 low density hydraulic fluid. When working on your aircraft, any products that offer reduced weight are preferred. This hydraulic fluid boosts performance while reducing weight. Enjoy this one gallon pail of Skydrol LD-4 as a part of routine maintenance. Stock up or purchase one today to try on your aircraft.