Overall dimensions: approx. ): 70 mm, hole: 5.5 mm. Plastic replacement blades for Gardena brush cutters and cordless grass trimmers - Easy to replace - Suitable for trimmers type 9823, 9825, 9820, 9821, 9828, 9829, 8840, 8841, 2417. The RotorCut replacement blades are also compatible with the trimmers EasyCut Li-18/23 R (art. no. 9823), ComfortCut Li-18/23 R (art. no. 9825), AccuCut 400 Li (art. no. 8840), AccuCut 450 compatible Li (P/N 8841) and AccuCut (P/N 2417) Compatibility is for reference only. Please compare the following information with the original hole size before purchasing. Quantity: 100 plastic blades for Gardena trimmers.