Polyaire Neck Adaptor – Square to Round by Polyaire $44.08 150X150-150 - $44.08 200X200-150 - $66.33 200X200-200 - $68.39 250X250-150 - $71.07 250X250-200 - $71.07 250X250-250 - $64.06 300X300-150 - $57.68 300X300-200 - $68.80 300X300-250 - $70.66 300X300-300 - $74.98 350X350-200 - $65.92 350X350-250 - $65.92 350X350-300 - $71.69 350X350-350 - $61.39 400x400-200 - $65.30 400x400-250 - $77.46 400x400-300 - $73.13 400x400-350 - $71.28 400x400-400 - $65.30 450x450-200 - $73.13 450x450-250 - $76.22 450x450-300 - $80.75 450x450-350 - $83.22 450x450-400 - $87.14 450x450-450 - $96.20 500x500-200 - $79.10 500x500-250 - $79.31 500x500-300 - $82.81 500x500-350 - $86.10 500x500-400 - $69.42 500x500-450 - $88.17 500x500-500 - $86.11 565X565-200 - $85.70 565X565-250 - $86.11 565X565-300 - $89.40 565X565-350 - $92.91 565X565-500 - $97.02 450X450 TO 150X150 - $94.14 450X450 TO 225X225 - $99.91 450X450 TO 375X375 - $104.44 150X150-150 200X200-150 200X200-200 250X250-150 250X250-200 250X250-250 300X300-150 300X300-200 300X300-250 300X300-300 350X350-200 350X350-250 350X350-300 350X350-350 400x400-200 400x400-250 400x400-300 400x400-350 400x400-400 450x450-200 450x450-250 450x450-300 450x450-350 450x450-400 450x450-450 500x500-200 500x500-250 500x500-300 500x500-350 500x500-400 500x500-450 500x500-500 565X565-200 565X565-250 565X565-300 565X565-350 565X565-500 450X450 TO 150X150 450X450 TO 225X225 450X450 TO 375X375 Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart This square to round neck adaptor is made from galvanised steel and is available in various sizes.