The Zurn Z539 12" heavy-duty drain with deep sump comes with a Dura-Coated cast iron deep sump body with bottom outlet, seepage pan, and combination membrane flashing clamp and frame for a sediment bucket and heavy-duty slotted grate.
Yes, by specifying the -H and -T options, Zurn can provide a hinged square top.
The slots are 3/8" wide, and the total open area is 33 square inches.
Zurn can offer a stainless steel veneer for the Z539. This would give the drain a stainless steel appearance from the surface, but have cast iron components below. Please contact Zurn Engineering for more information on this custom product.