ET-50: Long Ring Hole Diameter:15mm(0.59") Height: 22mm(0.86") Width: 20mm(0.78") ; ET-51: Ring Hole Diameter: 17mm(0.67") Height:13mm(0.51"); ET-55: Outsider Diameter: 22mm(0.86"), Hole Diameter: 15mm(0.59"), Height: 14mm(0.55"); ET-11: Hole Diameter: 15mm(0.59") Height:12mm(0.47") ; ET-36: Hole Diameter: 13mm(0.53") Length: 18mm(0.70") ; ET-53: Outside diameter 23mm(0.90"), Hole Diameter:15mm(0.59") ; ET-56: Outside diameter 23mm(0.90"), Hole Diameter:13mm(0.51") ; ET-52: Outside diameter 24mm(0.94"), Hole Diameter:18mm(0.71") ; ET:54: Ring Size: outside diameter 24mm(0.94"), Hole Diameter:14mm(0.55") . All Material Lead Free