Du-Bro 2-Blade easy to install model aircraft spinner FEATURES: - Simple easy and safe to install - Available in 7 sizes with multiple colors available per size - Each spinner comes complete with 5 shaft adapters (5mm 6mm 1/4 7mm 5/16 ). You don t have to drill out our back plates! - Unique nylon insert lock design for attaching the back plate and spinner gives a solid and secure hold - Designed with safety in mind - Made in the USA YOU WILL RECEIVE: - One (1) red 2-3/4 spinner - Five (5) shaft adapters (5mm 6mm 1/4 7mm 5/16 ) SPECIFICATIONS: - Weights (according to Du-Bro): - 1-1/2 (38.1mm): 12 grams - 1-3/4 (44.5mm): 19 grams - 2 (50.8mm): 26 grams - 2-1/4 (57.15mm): 34 grams - 2-1/2 (63.5mm): 49 grams - 2-3/4 (69.85mm): 57 grams - 3 (76.2mm): 69 grams description revised by: SN December 11 2019