1)the product is used on yacht, boat, ship. 2)material:stainless steel 316 or 304. 3)surface:mirror polishing. 4)specification: NO. Tube WT(g) XH0201A 7/8" 85 XH0200A 7/8" 233 Our company mainly manufactures various kinds of stainless steel marine hardware If you are interested in our products,please contact us.Thank you.