Halex60-AMP 120/240-Volt Non-Fuse Metallic AC Disconnect, HNF60R, 1 per pack

How many connection slots are in the box? Will it fit 6/3 gauge wire in and two 6/3 gauge wires going out?

can i use this on my mini-split that requires a 40 amp service?

I will install a mini split 18000 btu the disconnect box has to be 30 or 60 amp? what happens if i install a 60amp?

if i want to buy 100 ea , how much for ea ???