CLOSURE 29mm (29/25) Flat Water 30 mm. (30/25) Flat Water PCO 1881 (Hot-Filled/CAF) PCO 1881 (CSD) PCO 1810 (Hot-Filled) 38 mm (Heat-Resistance) TYPEWEIGHT29mm (29/25) Flat Water1.25 ± 0.1 g.30 mm. (30/25) Flat Water1.7 ± 0.1 g., 1.9 ± 0.1 g.PCO 1881 (Hot-Filled/CAF)2.15 ± 0.1 g.PCO 1881 (CSD)2.5 ± 0.1 g.PCO 1810 (Hot-Filled)2.6 ± 0.1 g.38 mm (Heat-Resistance)4.0 ± 0.1 g.