First4spares Shower Door Handle Knob - Elegant Cone Design (Satin Stainless, 30mm) 2 sided shower glass / cabinet door handle knob (elegant cone design, satin stainless steel) Measurements: handle diameter: 30mm, individual handle depth: 30mm, removable screw thread: 29mm x 6.5mm diameter Simply screw into place either side of shower / cabinet door Material: brushed satin stainless steel.