This is a Two-Blade Aluminum Spinner w/Aluminum Backplate and 120 Size Slot Cut-Outs For Larger Propellers. FEATURES: Larger 120 Slot Cut-Outs Are For Propellers Like APC 16-14N Precision Machined From Barstock Aluminum. Polished Aluminum Color With A Brushed Look. Easy To Install, Having A Bolt-On Design, Centers Each Spinner Perfectly On Its Baseplate. Spinner Cone Is Recessed To Mate Into the Spinner Backplate. The Rear Of The Spinner Is Flat, Without An Overhanging Cone. Includes Silver 10-32 x 1-1/4" Bolt For Holding Spinner Cone to Backplate. Adapter Kits For Different Engine Sizes Are Available Separately. (See COMMENTS) INCLUDES: One Aluminum Spinner Cone One Aluminum Backplate (See SPECS For Sizes) One Silver 10-32 x 1-1/4" Mounting Bolt One Tru Turn Decal Sheet One Instruction and Safety Tips Header Card REQUIRES: One Spinner Adapter Kit (See COMMENTS) Allen Wrench 4mm or 5/32" For Bolt (Both Fit Snugly) SPECS: Spinner Backplate Diameter: 2-3/4" (70mm) Spinner Backplate Mounting Ring Thickness: 3/16" (5mm) Spinner Backplate Hole Diameter: 3/8" (9.5mm) Length From Back Of Backplate To Front Of Cone: 2-3/4" (70mm) Height Of Propeller Slot: 1-1/16" (28mm) Length Of Propeller Slot: 1-9/16" (40mm) Weight: 2.10 ounce Prop Range: Up To 16 - 14 APC COMMENTS: Warning: Failure To Follow The Instructions Printed On The Card May Cause The Propeller To Separate From The Model. The Spinner Cone Must Not Touch The Propeller At Any Point, Only Authorized Agencies Should Modify The Spinner. Spinner Adapter Kit To Use Will Be Determined By Engine Crankshaft Size. Use One Of The Following: TRUQ3040: (1/4 - 28) (1/4" Bushing) (TT-0140-A) OS Max 20-60, K&B 19-65, Enya 25-53, HP 21-61, Fox 19-50, Webra 28-80, Irvine 20-61, Peco 21-45 TRUQ3045: (1/4" - 28) (7mm Bushing) (TT-0147-A) SuperTigre 25-60, Como 19-61, OPS 40-60 TRUQ3060: (5/16" - 24) (5/16" Bushing) (TT-516-A) OS Max 60FP, 61 FX & SF, SuperTigre 61-90 and G2300, Fox 60-120, Como 75-90 TRUQ3063: (5/16" - 24) (8mm Bushing) (TT-0518-A) OS Max 61-90 (2-Stroke), HP 120 (4-Stroke) TRUQ3066: (5/16" - 24 Jam Nut) (8mm Bushing) (TT-0522-A) OS Max 70-120 Surpass (4-Stroke) 140RX (2-Stroke), Abitar 120 (4-Stroke) TRUQ4010: (8 x 1.0mm) (8mm Bushing) (TT-0810-A) Enya R 120 (4-Stroke), OPS Super 60 & 61 5-Port, HP 120 (4-Stroke) TRUQ4015: (8 x 1.0mm Jam Nut Kit) (8mm Bushing) (TT-0814-A) YS 90-120 (4-Stroke) TRUQ4025: (8 x 1.25mm) (8mm Bushing) (TT-825-A) All YS (2-Strokes), OPS Maxi 30, Rossi 40-61, Peco 60-80, Webra 61-120 (All) TRUQ3065: (3/8" - 24) (No Bushing Required) (TT-375-A) OS Max 1.08, Maloney 1.00 & 1.25, Enya 2.40, Technopower (All), Brison (All) TRUQ3025: (10 x 1.25mm) (No Bushing Required) (TT-0125-A) Super Tigre 2000 - 3000 (4500 & 6000 12mm Reaming Required) (Not For The G2300, Use TRUQ3060) TRUQ3027: (10 x 1.25 x 50mm) (Hex Cap Screw-No Bushing) (TT-0127-A) Zenoah G-45 & G62 (10 x 1.25 x 55mm) (Hex Cap Screw-No Bushing) (TT-0127AL) MacMinarelli 70 & 85 TRUQ3047: (1/4" - 28 Jam Nut) (TT-0149-A) OS Max 26, 40, 48, 52 Surpass (4-Stroke) TRUQ3064: (5/16" - 24) (Long Jam Nut) (8mm Bushing) (TT-0520-A) OS Max 1.20 Flat Twin & Up (5/16" - 24 x 1-3/4") (8mm Bushing) (TT-0524-A) US Engines 35 & 41 (8 x 1.25 x 40mm) (8mm Bushing) (Hex Cap Screw) (TT0835A) Zenoah G-38