RAM Universal Wheelchair Ball BaseThis RAM ball base features a universal hardware pack that accommodates the arm and seat tracks on most major wheelchair brands including Invacare, Permobil, and Quickie, as well as any other universal mounting point. Pair with a variety of compatible RAM arms and extensions to build a custom mount to meet your specific needs.Specifications:Package Includes:(QTY. 2) #10-32 x 1/2″ Machine Screw(QTY. 2) #10-32 T-Nut (3/8″ x 5/8″)(QTY. 2) #10-32 T-Nut (1/2″ x 1″)(QTY. 2) M4 x 12mm Machine Screw(QTY. 2) M4 x 20mm Machine Screw(QTY. 2) M4 Stainless Steel Washer(QTY. 2) M4 Nylock NutMaterial: Powder Coated Marine Grade AluminumBall Size: C Size 1.5″ Rubber BallWeight: 0.3 lbs. Quick Guide (pdf)