Easiflex convex light base plate Low profile with shallow convexity. Belt ears integrated as part of the base plate. Why choose the convex light base plate? When a stoma is retracted or there seems to be uneven areas around the stoma it can be difficult to fit the base plate accurate and avoid leakage. This problem can be accommodated using the Easiflex convex light base plate. Enabling a better fit around the stoma.