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Pulley and blocks

 

4B - Tackle blocks

4K - K multi-race pulley

for flylofts

4L - Wooden block

for fixed pulleys

4LA - Auto-blocking wooden block

for flyloft

4LR - Wooden block (wheel only)

for flyloft and fixed pulleys

4N - N multi-race pulley

for flylofts

4P - PVC block

for fixed pulleys

4PA - Auto-blocking PVC block

for flyloft

4PR - PVC block (wheel only)

for flylofts and fixed pulleys

4TA 5 - Auto-blocking TFE multi-race pulley

for flylofts