Hello , I need the minimum hard plastic trays weighing 500 grams. We would start with an order of 1000 units, the measurements I need is 35.5 cm by 45.3 cm and in black. We are going to look at the catalog to see if something else suits our needs. It would be for a hotel. This size that I indicate to you, I think it is a standard size. If not, please tell us. since we want to buy a large quantity and we don't want to make a mistake. Thank you so much.