A filter with a removable mesh inner for cleaning.
This filter has 13mm connections PLUS additional 4mm screw on adaptors that convert the filter to a 4mm filter. You can use this as a 13mm filter, 4mm filter or as a reducing fitting (13mm tubing or grommet filtered down to a 4mm outlet - ideal for aquaponics applications to reduce blockages on drip lines). The 4mm barbs feature the white screw on caps which lock the tubing in place.
Also available are 13mm to 4mm crosses, 13mm Tees, 13mm elbows featuring the same barb and screw cap fittings for a secure fitting to the tubing.