I need a pair of rubber stoppers that function as per the attached diagram. The larger stopper (standard size 1) serves as the nose cone of a toy rocket. The smaller stopper (standard size 0) serves to lock the pair by tightening the screw. You may see demo video at GPADA.org Please quote workable pair(s) that will function as shown where the fuselage is 1/2 inch, schedule 40 PVC pipe. Indicate in your quote if the the larger stopper hole will be enlarged to accommodate the small washer and screw head. You may submit multiple variations for consideration. Thank you for your time and attention. Show More