The Stanley Tools Tylon Pocket Tapes have a corrosion resistant, long-lasting, nylon coated blade, with dual-material case for improved grip and positive blade lock for accurate measurements. Fitted with a Tru-zero hook, that compensates accurately for internal and external measurements, with triple rivet construction for improved strength and durability.This Twin Pack, contains the following:1 x Tylon&tradePocket Tape 5m/16ft with a blade width of 19mm. 1 x Tylon&tradePocket Tape 8m/26ft with a blade width of 25mm.Accuracy: Class II.