Inquiry (采购产品): Torus/Donut special order What would you charge to produce one (1) torus (donut) glass tube whose (hollow) inner diameter is 7/8" and whose outer diameter (across the torus) is 12" (that is the torus should fit within a square box whose inner side is 12 inches)? The thickness of the tube wall is not critical but should be strong enough to support a rolling steel ball of 3/4" diameter. To be able to insert the ball into the tube it is necessary to have a hole on the "top side" slightly larger than 3/4 inch (with the torus lying flat on a table, the top side is up). NB the ball must roll freely within the whole torus. Douglas G. Danforth danforth@greenwoodfarm.com Cleveland, Ohio **** Hidden Message ***** Douglas G. Danforth 264 Richmond Rd Richmond Heights, OH 44143 USA Company: Greenwood Farm Technologies, LLC Title: President Phone: deaf E-mail: danforth@greenwoodfarm.com **** Hidden Message ***** danforth@greenwoodfarm.com
