Make a physical mold used for mass-production from plaster and wax.
Cuts and shapes rubber surgical tubing for medical use: Seals one end of tubing with rubber plug and cuts sealed end to specified shape with knife. Fills tubing with water to aid curing process and ties off end. Lubricates shaped end when tubing dries, and pushes it into glass curing form. Holds vacuum hose over hole in end of form to draw tubing into curing form. Folds extending tied end of tubing down against outside of form, wraps it with tape, and covers hole in tube with cement to make tube airtight. Places form in rack for curing. Removes cement from hole after curing to allow air to enter and pulls tubing from form.