Sponge Washer: Sponge washer is used to fix the propeller and prevent the propeller from shaking. Protection Function: Shockproof and anti fall, the propeller case protect the propeller, prevent the propeller from being crushed. Applicable Models: Precise mold opening, the blade protection case is specially designed for FPV propeller. Portable Travel: The propeller storage box can be stored in the backpack, small and light, easy to carry. Material: Using high quality plastic material, the propeller storage box is anti drop, dustproof and wear resistant. Feature: 1. Material: Using high quality plastic material, the propeller storage box is anti drop, dustproof and wear resistant. 2. Protection Function: Shockproof and anti fall, the propeller case protect the propeller, prevent the propeller from being crushed. 3. Portable Travel: The propeller storage box can be stored in the backpack, small and light, easy to carry. 4. Sponge Washer: Sponge washer is used to fix the propeller and prevent the propeller from shaking. 5. Applicable Models: Precise mold opening, the blade protection case is specially designed for FPV propeller. Specification: Item Type: Propeller Storage Box Material: Plastic Product Color: Black Product Weight: Approx. 71g / 2.5oz Applicable Models: For FPV Drone Package List: 1 x Storage Box Note: 1. Please allow 13mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.