Liquid Bearings, SUPERIOR 100%-synthetic oil for lubrication of drones, quadcopters, RC vehicles and equipment Ideal for drone motor lubrication, cooler operation!! Immediately begins to displace old petro-oils or sprays. Makes drones operate more quietly and gives longer flights! Includes all 3 needle lengths, 1/2", 1-1/2", and EXTRA-LONG 3" Plastic-safe for all plastics and painted surfaces!