White PVC Equal L-shaped Angle profile, (L)2.5m (W)50mm
Outwater Black 1/2-in X 1/2-in X 3/64 (.047-in) Thick Styrene Plastic Even Leg Angle Moulding 36-in Lengths (Pack of 4) in the Furniture Moulding department at Lowes.com
PLASTIC UPVC PVC CORNER 90 DEGREE ANGLE TRIM 2 X 2.4m VARIOUS SIZES AND COLOURS