Post cap 1. Post Cap Size we provide: 41x41mm, 51x51mm, 61x61mm, 71x71mm, 75x75mm, 91x91mm, 97x97mm, 101x101mm, 120x120mm 2. Post Cap materials we provide: Stainless Steel 304 Stainless Steel 430 Hot Gavlvanized Iron Copper 3. Post Cap Materials Thickness: 0.8mm, 1.0mm, 1.20mm 4. The hole diameter for crews:4mm 5. Post Cap Design we provide: Square, Round, Square base with round ball. 6. Buyer's design, size, materials ia available