eBay

Sold as 30/PD.
Isometric grid features nonreproducible blue 30 degree ISO grid with border to aid in scaling drawings in three main directions. Ideal for plumbing, heating and air conditioning, and mechanical design layouts.
Ideal for plumbing, heating and air conditioning, and mechanical design layouts. 30 Sheets.
Size: 8 1/2" x 11". Isometric 30 degree grid pad.
Isometric grid features nonreproducible blue 30 degree ISO grid with border to aid in scaling drawings in three main directions. Dimensions: 8 1/2" x 11".

Clearprint 3020 Bond Pad with Printed Fade-Out 30-Degree Isometric Grid, 20 lb., 8-1/2 x 11 inches is perfect for initial design work and professional presentation prints. Provides a sharp, dense image on a bright white background. 10x10 per inch faint blue grid is non-reproducible when scanned or photocopied. Pad is ideal for use with pencil, ink, pen and traditional drafting products in plotters, laser printers and copiers. Made in USA. 30 sheets.