Lumenier QAV250-CF-PG Carbon Fiber Prop Guards Each assembled prop guard weighs 13.25g. Total for all 4 guards together is 53g. Will fit on G10 QAV250, Carbon Fiber QAV250 and possibly other mini quad frames that use 5" props. Includes 4x prop guard sets made of Carbon Fiber and 12 x 35mm aluminum spacers and screws Not Included but required: Longer Motor Mounting ScrewsFor motors that use M3 screws, you will need 16 M3 screws that are 7-8mm long.For motors that use M2 screws, you will need 16 M2 screws that are 7-8mm long.