Okw top knob marking elements pinarrow 16mm bluegreengrey okw a 11 01 005 this okw a 11 01 005 top knob pin marking element green 16mm is a simple push on marker that fits snugly into the top knob making the lateral screw fixing invisible while also excluding the contact with live parts it is also possible to make a subsequent replacement of the marker okw a 11 01 005 marking element pin for top knob lagoon