Your search for "WF-" revealed the following:

Peeled type (weed sage green) Height 6mm : Martin Uhlberg Non-scale WB-SWS

Matte type (forest) 20mm height with autumn powder : Martin Uhlberg Non-scale WB-M045

Field (with powder) Winter, height 2mm : Martin Uhlberg Non-scale WB-PW206

Peeled type (Weed Conifer Green) 12mm height : Martin Uhlberg Non-scale WB-LWCG

Matte type (wilderness), height 6mm, early autumn, with powder : Martin Uhlberg Non-scale WB-M028

Matte type (wilderness), height 6mm, with spring powder : Martin Uhlberg Non-scale WB-M022

Matte type (Wilderness) Height 6mm Early Winter : Martin Uhlberg Non-scale WB-M031

Field (with powder) Winter, height 6mm: Martin Uhlberg Non-scale WB-PW606

Peeled type (with turf powder) Autumn, height 2mm : Martin Uhlberg Non-scale WB-PW225

Peeled type (Weed Autumn Gold) 12mm height : Martin Uhlberg Non-scale WB-LWAG

Field Winter Height 12mm : Martin Uhlberg Non-scale WB-P126