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for use with sand pouring cylinder SL150 BS1377-9
with release valveBS1377-9
with 200mm diameter hole in centre BS1377-9
for use with sand pouring cylinder SL155BS1377-9
with 100mm diameter hole in centre BS1377-9
for use with sand pouring cylinder SL158BS1377-9
with 150mm diameter hole in centreBS1377-9