looking to make a vacuum container wire feed-through, thinking I'll drill a hole into an existing aluminum blocking plate (maybe with a chamfer/angle to it), shove some piano wire through the stopper, then shove that into the blocking plate and pump down. Maybe I'd extend the existing blocking-plate screws and screw down a clamp on the stopper. But I can't find a supplier for these. The closest I've come is this list (personally I think I'd pick the sphere out of any of these, as it seems like it'd seat more like a stopper in the hole): $5.46 3/4" inch Viton Fluoroelastomer Sphere, 70A Durometer, Precision Ground Finish, No Backing, Black, Inch http://www.amazonsupply.com/dp/B00CCGYHZO?ref_=sr_1_9_txt $45.62 1 sq ft of 1/8" inch sheeting http://www.amazonsupply.com/dp/B0075ZN4RE?ref_=sr_1_2_txt $7.09 Stopper that is questionable as to whether holes come as-purchased: http://www.amazon.com/Universal-Stopper-Viton-Synthetic-Rubber/dp/B0011Z90P4/ref =sr_1_1?ie=UTF8&qid=1406519692&sr=8-1&keywords=viton+stopper $24.90 VITON RUBBER SHEET 1/8" THICK 6" X 6" SQUARE ACID CHEMICAL HIGH TEMP http://www.ebay.com/itm/VITON-RUBBER-SHEET-1-8-THICK-6-X-6-SQUARE-ACID-CHEMICAL- HIGH-TEMP-/200891967372?pt=LH_DefaultDomain_0&hash=item2ec618278c $6.50 1 Gasket 2in Disc 1/16 Thick Replacement Viton Rubber MadeBy ElisGeneralStoreLLC http://www.ebay.com/itm/1-Gasket-2in-Disc-1-16-Thick-Replacement-Viton-Rubber- MadeBy- ElisGeneralStoreLLC-/251595451636?pt=LH_DefaultDomain_0&hash=item3a9441ecf4 (I also found some someone on youtube or something claiming to have made some viton stoppers in a small batch and had some for sale, but I never heard back from them) -- -Nathan _______________________________________________ Hosted by the MEMS and Nanotechnology Exchange, the country's leading provider of MEMS and Nanotechnology design and fabrication services. Visit us at http://www.mems-exchange.org Want to advertise to this community? See http://www.memsnet.org To unsubscribe: http://mail.mems-exchange.org/mailman/listinfo/mems-talk