Staple
From Amazon
Bosch 1000x Fine Wire Staples Type 53 (Textiles, Carpet, Acoustic panels, Lawn carpet, 11.4 x 0.74 x 6 mm, Accessories Tacker, Staple Gun)
Conrad Electronic
Bosch Accessories 2609255819 Staple strip Type 53 1000 pc(s) Dimensions (L x W) 6 mm x 11.4 mm