2.9X25mm visibility: 15m 2pcs/bag
3.0X18mm visibility: 30m 2pcs/bag (big nob)
3.0X20mm visibility: 15m 2pcs/bag
4.5X37mm visibility: 30m 2pcs/bag
4.5X37mm visibility: 50m 2pcs/bag(big nob)
6.0X50mm visibility: 50m 2pcs/bag
7.5X75mm visibility: 100m 1pcs/bag