Same as the single cup set....A big surprise,they fit the wp17 torch....This set looks exactly as my wp9 stubby set,but the treads fit the wp17. As stated before,at my age,every help to clearly see the weldpudlle is welcome,so "welcome ,pirex cups". There is only 1 minor problem with these colletbodies......nml,trying to change from one colletbody to the next,one easely breaks-off the diffuserscreen...while it is a tight fit in the cups.Other than that,no complaints whatsoever.

Same as the single cup set....A big surprise,they fit the wp17 torch....This set looks exactly as my wp9 stubby set,but the treads fit the wp17. As stated before,at my age,every help to clearly see the weldpudlle is welcome,so "welcome ,pirex cups". There is only 1 minor problem with these colletbodies......nml,trying to change from one colletbody to the next,one easely breaks-off the diffuserscreen...while it is a tight fit in the cups.Other than that,no complaints whatsoever.

Same as the single cup set....A big surprise,they fit the wp17 torch....This set looks exactly as my wp9 stubby set,but the treads fit the wp17. As stated before,at my age,every help to clearly see the weldpudlle is welcome,so "welcome ,pirex cups". There is only 1 minor problem with these colletbodies......nml,trying to change from one colletbody to the next,one easely breaks-off the diffuserscreen...while it is a tight fit in the cups.Other than that,no complaints whatsoever.