Specifications:3.5" /89mm Anodized CNC Aluminum Drilled RC Spinner For Gas Engine DLE30/55 MLD35/70 DA50/EVO54 Features:1. Prop mounting holes and drilled2.Hallowed Design bottom plate can effectively reduce the weight3.Antiskid design4.Fix slot design , makes the installation more stable.5.Enough prop mounting mouth,playing gas airplane without worry out reaming