DMC Petra Crochet Cotton Perle No.8 count - Petra is a mercerized twisted thread in 100% long staple Egyptian cotton, also known as Pearl Cotton. Suitable for Knitting & Crocheting and is ideal for clothing & accessories, baby items & home decor. Also suitable for Embroidery, Hardanger, Needlepoint, Cross-stitch, Tatting and more. Other colours available to order, click on black ball to view shade card.