Professional acrylic painting PE6018SB / PE6018B-SB 100% natural cotton, fine grain, ±280g/m2 PE5303SB / PE5303B-SB 100% natural cotton, medium grain,±350g/m2 Staples on the Back pine / paulownia stretcher bars Professional frame construction with kiln-dried,beveled stretcher bars avoid to be touched by the brushes on painting 8pcs of wooden wedges to re-tighten the canvas Stretched by hand for the best tension and tailored corners Ultra Smooth Texture, Triple Acrylic Primed, Special coating and excellent water absorbency are most suitable for acrylic water mixable painting and perform watercolor painting effects. Suitable for Acrylic water mixable painting, direct painting, thick pile skill and oil painting. Artist watercolor canvas PE6031SB Staples on the Back PE6031B-SB Staples on the Back 100% natural cotton, fine grain,±250g/m2 pine / paulownia stretcher bars Professional frame construction with kiln-dried,beveled stretcher bars avoid to be touched by the brushes on painting 8pcs of wooden wedges to re-tighten the canvas Stretched by hand for the best tension and tailored corners Specially formulated gesso for all water based paints Excellent water absorbency accepting all water media Superb pigment lifting ability for easy washes and corrections. Scratching or scraping the surface will not harm the canvas which will not tear like watercolor paper does. Tighten canvas will not buckle like watercolor paper when wet. Hand oil primed PE6024SB Staples on the Back PE6024B-SB Staples on the Back 100% linen, fine grain, ±300g/m2 pine / paulownia stretcher bars Professional frame construction with kiln-dried,beveled stretcher bars avoid to be touched by the brushes on painting 8pcs of wooden wedges to re-tighten the canvas Stretched by hand for the best tension and tailored corners Hand primed & pumiced Archivally sized With lead-like surface For oil paint only