Uxcell a15090900ux0388 Stainless Steel Advertising Nails Glass Standoff Holder 25x30 mm 20 Pcs (Pack of 20) Product type : Coupler Dimension: 25 x 30mm/ 1" x 1.2" (D*L); Color: Silver Tone Package Content: 20 x Glass Standoff; Material: Stainless Steel Thread Diameter: 9.5mm/ 0.37" Base Hole Diameter: 5mm/ 0.2"