This application description comes directly from the manufacturer's product text and describes the specific area of use

Material and Ergonomics

1 and ESD TR53)

The bit is also indicated as extra-rigid (Z) and referred to as part of WERA's "tough bits"

Bin material: clear polystyrene (PS)

RTMS 020 G MS TIP GULLWING 2.0 Unit(s):Pcs This application description comes directlyProduct Description The RTMS 020 G MS is a Weller SMART RT Micro active soldering tip (Item No. T0050109899). This product is a gullwing micro tip with dimensions of 1. 2 x 2. 0 mm and a tip width of 2. 0 mm. The tip is designed for use with Weller WXMPS MS tools and belongs to the SMART RT Micro Active Tips product family. Features Gullwing micro tip, dimensions 1. 2 x 2. 0 mm Tip width: 2. 0 mm Technical length: 0. 787 in MIL SPEC compliant