These run up blocks are designed to keep your windows & doors perfectly aligned when closing as well as stopping the opening sashes from dropping. They sit in the bottom of the window & door and when the sash is closed it lifts it in to the ideal position to give a smooth operation.

This Version is a heavy duty reinforced version for heavy bespoke UPVC windows and doors for replacing standard factory made ones that crush over time.

Print at 100% infill for reinforced

Tested with ABS, PLA & PLA+