Crystal Interior Ltd. Offers Triple Corner Unit for Kitchen. Crystal Interior Ltd. Is an ISO 9001:2000 accredited organization. The Triple Corner Unit is fitted in front of the kitchen worktops ensuring the ease and convenience in carrying out all the kitchen related activities. The Triple Corner Unit is made from `AISI-304` Stainless Steel with chromium plating. These corners are of width 225 mm, depth 225 mm and heights 690 mm. These are made from `AISI-304` Stainless Steel with chromium plating.