QD450(API500) Pneumatic Casing Elevators/Spiders Model:QD135,QD315,QD450 Slip type casing elevators/spiders are tools for handling casing from 41/2-14 inch O.D. and with capacties of 350 and 500 tons........Casing size (in)4 1/2,5,5 1/2,6 5/8,7,7 5/8,7 3/4,8 5/8,8 3/4,9 5/8,9 3/4,9 7/8, 10 3/4,10 7/8,11 3/4,11 7/8,13 3/8,13 1/2,13 5/8,13 3/4,14.Max .load tongs (kN)350(3150)500(4500)