RC Model Boat Waterproof Push Rod Rubber Seal Bellow + Aluminum Mount Product Name : Push Rod Rubber Seal Bellow;Outer Diameter : 13mm/0.43" Bottom Hole Dia : 5mm/0.2";Length : 34mm /1.33" Aluminum Mount Size : 6.4 x 12 x 16mm/0.25" x 0.47" x 0.63(Inner D* O.D*H);Material : Rubber Color : Black;Net Weight : 5g Package Content : 1 x Push Rod Rubber Seal Bellow1 x Aluminum Mount