Inked and Screened  "Rotary Internal Combustion Engine - F. Wankel - 1961" Silk Screen Print Rotary Internal Combustion Engine - F. Wankel - 1961 - 8.5 x 11 - Blue Grid - White Ink Screen printed by Artisan Printers using a tried and true technique Hand made to order! Liven up your home or office with these sophisticated, original art pieces All designs are printed on high quality 100lb paper and are printed with non-toxic acrylic ink