15 pack push disc for 1” inside diameter cardboard tubes (1.25” outside diameter) for CNC 37mm aluminum shells. These are designed for a very close fit in these particular shells inside diameter 34.68mm. They will work in other shells that are larger but will not fit as tight. I have new products in development for other shell inside diameters. Shell and cardboard tube not included 1 order = 15 push disc tube bases as shown in the main photo. Product has been improved- thicker skirt and taller - 100% infill so solid and heavy duty. Price increase due to cost of manufacture. Shipping is small USPS priority flat rate. I combine shipping and overage is refunded after mailing.