Specifications; ✚ 29053 - 100mm with Triple Vents - Packs of 10 or 500 Pieces ✚ 29153 - 100mm without Vents - Packs of 10 or 500 Pieces ✚ 29054 - 120mm without Vents - Packs of 10 or 320 Pieces ✚ 29056 - 150mm with Triple Vents - Packs of 10 or 140 Pieces