... Acrylic,ps,plastic *make light box ,LED letter vacuum forming machine for acrylic 1.Do not have upper and lower die ... , acrylic materials can be reused, no defects, fast, time saving.C. No external mold constraints, drawing a small amount of thinning ... box, arylic lighting letters etc.2. Strong structure of machine body, made of steel completely, more stable and durable.3. Integration functions ...