Kolar sub-gauge Tube set from a Max Skeet Carrier Barrel. Can be used with most .740" barrels. 20gauge, 28 gauge and 410. 20 gauge has 4 chokes, 28 gauge has 4 chokes and 410 has 5 chokes. Everything is clean and in good working order. These are for 30" barrels. $1200 + plus actual shipping from Rehoboth, Ma 02769
Might want to remeasure those, 740 is not a carrier barrel, kolar carrier barrels are in the 770 to 780 range, 740 is a std 12ga bore size, and if these were made for an actual carrier barrel there is no chance they will fit in a 740 bore gun.
As stated in the previous message these will fit a carrier barrel and you are correct .740 is the size of the 12g barrel and they will not fit, thanks...