Well I got the 1/2 in. crown air stapler from Harbor that turns out to be 3/8 not 1/2". It even says model 68025 air stapler uses 1/2 crown 20 gauge staples on the gun. Thats ok, it works great and it uses T50 arrow staples you can get anywhere. Luckily. The problem is I also ordered a full box of 5010 doufast 5/16 staples I can't use. Cost me 12.72+4.95 shipping. I'll take 15$ for the box and pay the shipping. PM me Thanks Don