Plastic End Caps with bellows fit 2 in OD Sq. Tubing Plastic End Caps with bellows fit 2 in OD Sq. Tubing  Ref: P280
Plastic PVC End Caps, square end caps, end cap for tubing,
End Caps inserts into 2 x 2 inch Steel Tube. This cap has bellows, which help keep the cap in place. (Minimum Order is $10.00) Volume discount for orders over 100 pcs.