Do-It-Yourself!  Only you know what tank lid configuration looks best for your tank.  These no wing, double wing , single winged corners, T connectors, and Cut-Outs will allow you to configure what you need.  **NEW** Flush design and rounded edges. 

**Check out other listings for AFS integration options** 
Pack A Overflow:  2 inverse corner + 2 single winged
Pack B:  4 double-winged corners
Pack C:  2 single-winged left + 2 single winged right
Pack D:  Set of T connectors (2 pieces)
Pack E:  70mm x 30mm cutout (1 piece)
RedSea Reefer 350 Pack:  complete set of corners needed to build a 3 pieces top for RedSea Reefer 350 - as shown in picture.  AFS tube not included.  Fit for other models cannot be guaranteed.  Total of 8 pieces included. 
Please Note: As these are 3D printed, minor imperfections are normal and to be expected.

Fits your standard replacement window screen kits (5/16 inch x 3/4 inch).
Fits for 7/16 x 3/4 frame avail upon request.