Welding insulation nail M4x270 A2 5 000 pcs. Welding insulation nail M4x290 A2 21 000 pcs. Welding insulation nail M4x250 A2 5 000 pcs. Welding insulation nail M4x390 A2 5 000 pcs. Welding insulation nail M4x330 A2 5 000 pcs. Welding insulation nail M4x170 Cu 50 000 pcs. Welding insulation nail M4x250 Cu 62 000 pcs. Welding insulation nail M4x210 Cu 4 000 pcs. Welding insulation nail M4x230 Cu 19 000 pcs. Welding insulation nail M4x310 Cu 4 000 pcs. Welding insulation nail M4x260 Cu 2 000 pcs. Welding washer for these nails M4x50 (3 cuts, may be 4) 405 000 pcs.