It's 18'' 7 Weft Body Wave Clip Synthetic Hair in One Convenient Pack Clip in Hair Extensions for added length and volume for busy, style conscious clients. Hair Type: High Heat Synthetic Heat resistant: Yes Product type: clips. Package weight: (approximately) 180g. Packs per head: 1. Recommendations: Start with the 5" pieces, followed by the 9", 7" pieces and four 3" pieces to complete the look. Unique Features: One package contains 7 individual wefts measuring 18" in length.