Junckers PVC Joint Spacers for nailed floors. 

To keep the required 10 board measurement, 10-BM.

Bags of 300 pcs.

Green, 0.2 mm (10 BM = 129.2/140.2/185.2 m

Yellow, 0.4 mm (10 BM = 129.4/140.4/185.4 mm)

Black, 0.6 mm (10 BM = 129.6/140.6/185.6 mm)

Red, 0.8 mm (10 BM = 129.8/140.8/185.8 mm)