Y-Shaped Flint Glass Connecting Tube, Arm Length: 1 1/2in, with a 120 deg angle provides safer connections as the ends have constrictions to hold rubber tubing securely, Made from quality flint glass, Size: 1/4in ID X 5/16in OD (7.9mm)
Rotational Motion Accessory Kit, Use to study the motion of a physical pendulum; the rotational inertia of disks, rings, and point masses; and the conservation angular momentum, inlude hollow aluminum rod, Ultra Pulley