Special made to order custom machined plexy glass acrylic Heavy Duty design bore flow stand. Dimensions are 6-3/4″wide X 20″long X 4-3/4″ tall 15/16″+- .080″ thick top and bottom plates plus parallel machined +-.010″. Has a 5″ square mounting bolt pattern fits superflow bench. This bore stand has one end 4.310″and other end is 4.500″+-0.010″I.D. Tolerance. Flame polished and solvent welded. Process time 7-10 business days . Item is doubled boxed for shipping so it reaches it designation safely. Bore to customers specs add $75.